EWS fixes - part 2

src/exchange_ews/contact_map.rs

@@ -92,35 +92,52 @@ pub fn to_jscontact(raw: &ContactItemRaw) -> Value {
             Value::Object(map_singleton("1", json!({"@type": "Title", "name": t}))),
         );
     }
-    if !raw.emails.is_empty() {
+    {
         let mut map = Map::new();
-        for (i, (key, addr)) in raw.emails.iter().enumerate() {
-            let entry_id = format!("{}", i + 1);
+        for (i, (key, addr)) in raw
+            .emails
+            .iter()
+            .filter(|(_, v)| !v.trim().is_empty())
+            .enumerate()
+        {
             let mut entry = Map::new();
             entry.insert("@type".to_owned(), Value::String("EmailAddress".to_owned()));
             entry.insert("address".to_owned(), Value::String(addr.clone()));
             entry.insert("contexts".to_owned(), email_contexts(key));
-            map.insert(entry_id, Value::Object(entry));
+            map.insert((i + 1).to_string(), Value::Object(entry));
+        }
+        if !map.is_empty() {
+            card.insert("emails".to_owned(), Value::Object(map));
         }
-        card.insert("emails".to_owned(), Value::Object(map));
     }
-    if !raw.phones.is_empty() {
+    {
         let mut map = Map::new();
-        for (i, (key, num)) in raw.phones.iter().enumerate() {
-            let entry_id = format!("{}", i + 1);
+        for (i, (key, num)) in raw
+            .phones
+            .iter()
+            .filter(|(_, v)| !v.trim().is_empty())
+            .enumerate()
+        {
             let mut entry = Map::new();
             entry.insert("@type".to_owned(), Value::String("Phone".to_owned()));
             entry.insert("number".to_owned(), Value::String(num.clone()));
             entry.insert("contexts".to_owned(), phone_contexts(key));
             entry.insert("features".to_owned(), phone_features(key));
-            map.insert(entry_id, Value::Object(entry));
+            map.insert((i + 1).to_string(), Value::Object(entry));
+        }
+        if !map.is_empty() {
+            card.insert("phones".to_owned(), Value::Object(map));
         }
-        card.insert("phones".to_owned(), Value::Object(map));
     }
-    if !raw.ims.is_empty() {
+    {
         let mut map = Map::new();
-        for (i, (key, addr)) in raw.ims.iter().enumerate() {
-            let entry_id = format!("{}", i + 1);
+        for (i, (key, addr)) in raw
+            .ims
+            .iter()
+            .filter(|(_, v)| !v.trim().is_empty())
+            .enumerate()
+        {
+            let entry_id = (i + 1).to_string();
             let mut entry = Map::new();
             entry.insert(
                 "@type".to_owned(),
@@ -132,7 +149,9 @@ pub fn to_jscontact(raw: &ContactItemRaw) -> Value {
             }
             map.insert(entry_id, Value::Object(entry));
         }
-        card.insert("onlineServices".to_owned(), Value::Object(map));
+        if !map.is_empty() {
+            card.insert("onlineServices".to_owned(), Value::Object(map));
+        }
     }
     if !raw.addresses.is_empty() {
         let pref_key = raw
@@ -185,7 +204,7 @@ pub fn to_jscontact(raw: &ContactItemRaw) -> Value {
         }
         card.insert("keywords".to_owned(), Value::Object(keywords));
     }
-    if let Some(notes) = raw.notes.as_ref() {
+    if let Some(notes) = raw.notes.as_ref().filter(|n| !n.trim().is_empty()) {
         card.insert(
             "notes".to_owned(),
             Value::Object(map_singleton("1", json!({"@type": "Note", "note": notes}))),
@@ -341,6 +360,29 @@ mod tests {
         assert_eq!(v["phones"]["1"]["contexts"]["work"], true);
     }
 
+    #[test]
+    fn empty_body_and_empty_im_entry_are_omitted() {
+        let raw = ContactItemRaw {
+            display_name: Some("Random Person".to_owned()),
+            notes: Some(String::new()),
+            ims: vec![("ImAddress1".to_owned(), String::new())],
+            emails: vec![("EmailAddress1".to_owned(), "  ".to_owned())],
+            phones: vec![("MobilePhone".to_owned(), "+17801234567".to_owned())],
+            ..ContactItemRaw::default()
+        };
+        let v = to_jscontact(&raw);
+        assert!(v.get("notes").is_none(), "empty body must not emit notes");
+        assert!(
+            v.get("onlineServices").is_none(),
+            "empty IM entry must not emit onlineServices"
+        );
+        assert!(
+            v.get("emails").is_none(),
+            "whitespace-only email must not emit emails"
+        );
+        assert_eq!(v["phones"]["1"]["number"], "+17801234567");
+    }
+
     #[test]
     fn synthetic_uid_is_stable() {
         let u1 = synthetic_uid("ITEM-1");

src/exchange_ews/parse.rs

@@ -956,6 +956,7 @@ pub fn parse_message_item(inner_xml: &str) -> Result<MessageItem, EwsError> {
     let mut mime_charset: Option<String> = None;
     let mut category_collecting = false;
     let mut in_flag = false;
+    let mut in_flagstatus_ext = false;
     let mut cur = String::new();
     loop {
         buf.clear();
@@ -999,6 +1000,13 @@ pub fn parse_message_item(inner_xml: &str) -> Result<MessageItem, EwsError> {
                         in_flag = true;
                     } else if in_flag && local.eq_ignore_ascii_case(b"FlagStatus") {
                         current = Some("flagStatus");
+                    } else if local.eq_ignore_ascii_case(b"ExtendedFieldURI") {
+                        if let Some(tag) = attr_value(e, b"PropertyTag") {
+                            let t = tag.trim().to_ascii_lowercase();
+                            in_flagstatus_ext = t == "0x1090" || t == "4240";
+                        }
+                    } else if in_flagstatus_ext && local.eq_ignore_ascii_case(b"Value") {
+                        current = Some("flagStatusExt");
                     } else {
                         current = None;
                     }
@@ -1027,6 +1035,9 @@ pub fn parse_message_item(inner_xml: &str) -> Result<MessageItem, EwsError> {
                         }
                         "category" => item.categories.push(text),
                         "flagStatus" => item.flag_status = Some(text),
+                        "flagStatusExt" if text.trim() == "2" => {
+                            item.flag_status = Some("Flagged".to_owned());
+                        }
                         _ => {}
                     }
                 }
@@ -1035,6 +1046,8 @@ pub fn parse_message_item(inner_xml: &str) -> Result<MessageItem, EwsError> {
                     category_collecting = false;
                 } else if lower == b"flag" {
                     in_flag = false;
+                } else if lower == b"extendedproperty" {
+                    in_flagstatus_ext = false;
                 }
             }
             Event::Text(ref t) => {
@@ -2248,6 +2261,64 @@ mod tests {
         assert!(matches!(r[1].response_code, ResponseCode::ItemNotFound));
     }
 
+    #[test]
+    fn pid_tag_flag_status_extended_property_marks_message_flagged() {
+        fn parse_one(message_xml: &str) -> MessageItem {
+            let body = format!(
+                "<m:GetItemResponse{NS}><m:ResponseMessages>\
+                 <m:GetItemResponseMessage ResponseClass=\"Success\">\
+                   <m:ResponseCode>NoError</m:ResponseCode>\
+                   <m:Items>{message_xml}</m:Items>\
+                 </m:GetItemResponseMessage></m:ResponseMessages></m:GetItemResponse>"
+            );
+            let r = parse_response_messages(body.as_bytes(), b"GetItemResponseMessage").unwrap();
+            parse_message_item(&r[0].inner_xml).unwrap()
+        }
+
+        let flagged = parse_one(
+            "<t:Message><t:ItemId Id=\"F1\" ChangeKey=\"K\"/>\
+             <t:Subject>Flagged</t:Subject>\
+             <t:ExtendedProperty>\
+               <t:ExtendedFieldURI PropertyTag=\"0x1090\" PropertyType=\"Integer\"/>\
+               <t:Value>2</t:Value>\
+             </t:ExtendedProperty>\
+             <t:IsRead>true</t:IsRead></t:Message>",
+        );
+        assert_eq!(flagged.flag_status.as_deref(), Some("Flagged"));
+        assert_eq!(flagged.is_read, Some(true));
+
+        let cleared = parse_one(
+            "<t:Message><t:ItemId Id=\"F2\" ChangeKey=\"K\"/>\
+             <t:ExtendedProperty>\
+               <t:ExtendedFieldURI PropertyTag=\"0x1090\" PropertyType=\"Integer\"/>\
+               <t:Value>0</t:Value>\
+             </t:ExtendedProperty></t:Message>",
+        );
+        assert_eq!(cleared.flag_status, None);
+    }
+
+    #[test]
+    fn native_item_flag_still_parses_on_exchange_2013_plus() {
+        let body = format!(
+            "<m:GetItemResponse{NS}><m:ResponseMessages>\
+             <m:GetItemResponseMessage ResponseClass=\"Success\">\
+               <m:ResponseCode>NoError</m:ResponseCode>\
+               <m:Items><t:Message><t:ItemId Id=\"M\" ChangeKey=\"K\"/>\
+                 <t:Subject>Native</t:Subject>\
+                 <t:Flag><t:FlagStatus>Flagged</t:FlagStatus></t:Flag>\
+                 <t:IsRead>false</t:IsRead></t:Message></m:Items>\
+             </m:GetItemResponseMessage></m:ResponseMessages></m:GetItemResponse>"
+        );
+        let r = parse_response_messages(body.as_bytes(), b"GetItemResponseMessage").unwrap();
+        let p = parse_message_item(&r[0].inner_xml).unwrap();
+        assert_eq!(
+            p.flag_status.as_deref(),
+            Some("Flagged"),
+            "the 2013+ native item:Flag path must be unaffected by the pre-2013 extended-property fallback"
+        );
+        assert_eq!(p.is_read, Some(false));
+    }
+
     #[test]
     fn sync_folder_items_emits_create_delete_readflag() {
         let body = format!(

src/exchange_ews/recurrence.rs

@@ -92,10 +92,11 @@ pub fn to_jscalendar_rule(raw: &RawRecurrence) -> Option<Value> {
     match raw.range.as_ref() {
         Some(RecurrenceRange::NoEnd { .. }) | None => {}
         Some(RecurrenceRange::EndDate { end_date, .. }) => {
-            let local = if end_date.contains('T') {
-                end_date.clone()
+            let trimmed = end_date.trim().trim_end_matches('Z');
+            let local = if trimmed.contains('T') {
+                trimmed.to_owned()
             } else {
-                format!("{end_date}T23:59:59")
+                format!("{trimmed}T23:59:59")
             };
             rule.insert("until".to_owned(), Value::String(local));
         }
@@ -345,6 +346,19 @@ mod tests {
         assert_eq!(rule["bySetPosition"], json!([-1]));
     }
 
+    #[test]
+    fn end_date_with_trailing_z_yields_valid_local_until() {
+        let raw = RawRecurrence {
+            pattern: Some(RecurrencePattern::Daily { interval: 2 }),
+            range: Some(RecurrenceRange::EndDate {
+                start_date: "2026-07-01Z".to_owned(),
+                end_date: "2026-08-01Z".to_owned(),
+            }),
+        };
+        let rule = to_jscalendar_rule(&raw).unwrap();
+        assert_eq!(rule["until"], "2026-08-01T23:59:59");
+    }
+
     #[test]
     fn weekly_every_weekday_expands() {
         let raw = RawRecurrence {

src/exchange_ews/types.rs

@@ -148,6 +148,23 @@ impl ServerVersion {
     }
 }
 
+const SKIPPED_CONTAINER_CLASSES: [&str; 8] = [
+    "ipf.task",
+    "ipf.journal",
+    "ipf.stickynote",
+    "ipf.configuration",
+    "ipf.storeitem",
+    "ipf.skypeteams",
+    "ipf.files",
+    "ipf.note.outlookhomepage",
+];
+
+fn class_matches(lower_class: &str, lower_prefix: &str) -> bool {
+    lower_class == lower_prefix
+        || (lower_class.starts_with(lower_prefix)
+            && lower_class[lower_prefix.len()..].starts_with('.'))
+}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum FolderClass {
     Mail,
@@ -158,18 +175,25 @@ pub enum FolderClass {
 
 impl FolderClass {
     pub fn from_ipf(class: &str) -> FolderClass {
-        if class.eq_ignore_ascii_case("IPF.Note") {
-            FolderClass::Mail
-        } else if class.eq_ignore_ascii_case("IPF.Appointment")
-            || class.starts_with("IPF.Appointment.")
-        {
+        let lower = class.trim().to_ascii_lowercase();
+        if class_matches(&lower, "ipf.appointment") {
             FolderClass::Calendar
-        } else if class.eq_ignore_ascii_case("IPF.Contact") || class.starts_with("IPF.Contact.") {
+        } else if class_matches(&lower, "ipf.contact") {
             FolderClass::Contacts
-        } else {
+        } else if SKIPPED_CONTAINER_CLASSES
+            .iter()
+            .any(|p| class_matches(&lower, p))
+        {
             FolderClass::Skipped
+        } else {
+            FolderClass::Mail
         }
     }
+
+    pub fn is_mail_fallback(class: &str) -> bool {
+        let lower = class.trim().to_ascii_lowercase();
+        FolderClass::from_ipf(class) == FolderClass::Mail && !class_matches(&lower, "ipf.note")
+    }
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -300,6 +324,34 @@ mod tests {
         assert_eq!(FolderClass::from_ipf("IPF.Task"), FolderClass::Skipped);
     }
 
+    #[test]
+    fn absent_or_unknown_folder_class_falls_back_to_mail() {
+        assert_eq!(FolderClass::from_ipf(""), FolderClass::Mail);
+        assert_eq!(FolderClass::from_ipf("   "), FolderClass::Mail);
+        assert_eq!(FolderClass::from_ipf("IPF.SomethingNew"), FolderClass::Mail);
+        assert!(FolderClass::is_mail_fallback(""));
+        assert!(FolderClass::is_mail_fallback("IPF.SomethingNew"));
+        assert!(!FolderClass::is_mail_fallback("IPF.Note"));
+        assert!(!FolderClass::is_mail_fallback("IPF.Note.OutlookHomepage"));
+        assert!(!FolderClass::is_mail_fallback("IPF.Task"));
+    }
+
+    #[test]
+    fn internal_and_out_of_scope_classes_are_skipped() {
+        for c in [
+            "IPF.Task",
+            "IPF.Journal",
+            "IPF.StickyNote",
+            "IPF.Configuration",
+            "IPF.StoreItem.PdpProfileV2Secured",
+            "IPF.SkypeTeams.Message",
+            "IPF.Files",
+            "IPF.Note.OutlookHomepage",
+        ] {
+            assert_eq!(FolderClass::from_ipf(c), FolderClass::Skipped, "{c}");
+        }
+    }
+
     #[test]
     fn server_version_from_build() {
         assert_eq!(

src/exchange_ews/xml.rs

@@ -147,6 +147,10 @@ pub fn get_item_body(shape: ItemShape, ids: &[ItemId], version: ServerVersion) -
             out.push_str("<t:FieldURI FieldURI=\"item:ParentFolderId\"/>");
             if version >= ServerVersion::Exchange2013 {
                 out.push_str("<t:FieldURI FieldURI=\"item:Flag\"/>");
+            } else {
+                out.push_str(
+                    "<t:ExtendedFieldURI PropertyTag=\"0x1090\" PropertyType=\"Integer\"/>",
+                );
             }
             out.push_str("<t:FieldURI FieldURI=\"message:IsReadReceiptRequested\"/>");
             out.push_str("</t:AdditionalProperties>");
@@ -329,6 +333,14 @@ mod tests {
             !legacy.contains("item:Flag"),
             "item:Flag is an Exchange 2013 schema addition; must be omitted on 2010"
         );
+        assert!(
+            legacy.contains("PropertyTag=\"0x1090\""),
+            "on pre-2013 the follow-up flag must be fetched via the PidTagFlagStatus extended property"
+        );
+        assert!(
+            !modern.contains("0x1090"),
+            "the extended-property fallback is only used when item:Flag is unavailable"
+        );
         assert!(legacy.contains("item:DateTimeReceived"));
         assert!(legacy.contains("message:IsReadReceiptRequested"));
         assert!(

src/sync/import_exchange_ews/coordinator.rs

@@ -126,9 +126,14 @@ pub fn run(common: CommonConfig, config: EwsImportConfig) -> Result<Summary, Err
         &mut conn,
         source_id,
         &plan,
-        &mut mailbox_counts,
-        &mut calendar_counts,
-        &mut addressbook_counts,
+        &mut folders::ReconcileCounts {
+            mailbox: &mut mailbox_counts,
+            calendar: &mut calendar_counts,
+            addressbook: &mut addressbook_counts,
+            email: &mut email_counts,
+            calendar_event: &mut calendar_event_counts,
+            contact: &mut contact_counts,
+        },
         logger,
     )?;
 

src/sync/import_exchange_ews/folders.rs

@@ -20,7 +20,7 @@ use crate::exchange_ews::types::{DistinguishedFolderId, FolderClass, MailboxKind
 use crate::exchange_ews::xml::{
     FolderRef, FolderShape, Traversal, find_folder_body, get_folder_body,
 };
-use crate::logging::{LEVEL_PROGRESS, Logger};
+use crate::logging::{LEVEL_DEFAULT, LEVEL_PROGRESS, Logger};
 use crate::sync::TypeCounts;
 
 pub struct FolderPlan {
@@ -55,6 +55,20 @@ pub fn plan_folders(
     let mut contacts = Vec::new();
     for folder in parsed.folders {
         let class = FolderClass::from_ipf(&folder.folder_class);
+        if class == FolderClass::Mail
+            && FolderClass::is_mail_fallback(&folder.folder_class)
+            && logger.enabled(LEVEL_DEFAULT)
+        {
+            let shown = if folder.folder_class.trim().is_empty() {
+                "no"
+            } else {
+                "unrecognized"
+            };
+            eprintln!(
+                "warning: EWS folder {:?} has {shown} FolderClass ({:?}); importing as mail",
+                folder.display_name, folder.folder_class
+            );
+        }
         match (mailbox_kind, class) {
             (MailboxKind::Archive, FolderClass::Mail) => {
                 mail.push(ClassifiedFolder {
@@ -163,13 +177,26 @@ const WELL_KNOWN_ROLES: &[(DistinguishedFolderId, Option<&'static str>)] = &[
     (DistinguishedFolderId::ConversationHistory, None),
 ];
 
+struct DeleteTarget<'a> {
+    type_name: &'a str,
+    table: &'a str,
+    counts: &'a mut TypeCounts,
+}
+
+pub struct ReconcileCounts<'a> {
+    pub mailbox: &'a mut TypeCounts,
+    pub calendar: &'a mut TypeCounts,
+    pub addressbook: &'a mut TypeCounts,
+    pub email: &'a mut TypeCounts,
+    pub calendar_event: &'a mut TypeCounts,
+    pub contact: &'a mut TypeCounts,
+}
+
 pub fn reconcile(
     conn: &mut Connection,
     source_id: i64,
     plan: &FolderPlan,
-    mailbox_counts: &mut TypeCounts,
-    calendar_counts: &mut TypeCounts,
-    addressbook_counts: &mut TypeCounts,
+    counts: &mut ReconcileCounts<'_>,
     _logger: Logger,
 ) -> Result<(), Error> {
     let local_mailbox: HashMap<String, exchange_ews_ids::FolderRow> =
@@ -210,7 +237,7 @@ pub fn reconcile(
             source_id,
             id_to_local: &mut id_to_local,
             local: &local_mailbox,
-            counts: mailbox_counts,
+            counts: &mut *counts.mailbox,
             root_folder_id: &plan.root_folder_id,
         };
         upsert_mailbox(&mut ctx, folder, role)?;
@@ -222,7 +249,7 @@ pub fn reconcile(
             source_id,
             id_to_local: &mut id_to_local,
             local: &local_calendar,
-            counts: calendar_counts,
+            counts: &mut *counts.calendar,
             root_folder_id: &plan.root_folder_id,
         };
         upsert_calendar(&mut ctx, folder)?;
@@ -234,7 +261,7 @@ pub fn reconcile(
             source_id,
             id_to_local: &mut id_to_local,
             local: &local_addressbook,
-            counts: addressbook_counts,
+            counts: &mut *counts.addressbook,
             root_folder_id: &plan.root_folder_id,
         };
         upsert_address_book(&mut ctx, folder)?;
@@ -243,29 +270,50 @@ pub fn reconcile(
     delete_vanished(
         conn,
         source_id,
-        exchange_ews_ids::MAILBOX,
-        "mailboxes",
         &local_mailbox,
         &server_ids_mail,
-        mailbox_counts,
+        DeleteTarget {
+            type_name: exchange_ews_ids::MAILBOX,
+            table: "mailboxes",
+            counts: counts.mailbox,
+        },
+        Some(DeleteTarget {
+            type_name: exchange_ews_ids::EMAIL,
+            table: "emails",
+            counts: counts.email,
+        }),
     )?;
     delete_vanished(
         conn,
         source_id,
-        exchange_ews_ids::CALENDAR,
-        "calendars",
         &local_calendar,
         &server_ids_calendar,
-        calendar_counts,
+        DeleteTarget {
+            type_name: exchange_ews_ids::CALENDAR,
+            table: "calendars",
+            counts: counts.calendar,
+        },
+        Some(DeleteTarget {
+            type_name: exchange_ews_ids::CALENDAR_EVENT,
+            table: "calendar_events",
+            counts: counts.calendar_event,
+        }),
     )?;
     delete_vanished(
         conn,
         source_id,
-        exchange_ews_ids::ADDRESS_BOOK,
-        "address_books",
         &local_addressbook,
         &server_ids_addressbook,
-        addressbook_counts,
+        DeleteTarget {
+            type_name: exchange_ews_ids::ADDRESS_BOOK,
+            table: "address_books",
+            counts: counts.addressbook,
+        },
+        Some(DeleteTarget {
+            type_name: exchange_ews_ids::CONTACT_CARD,
+            table: "contact_cards",
+            counts: counts.contact,
+        }),
     )?;
     Ok(())
 }
@@ -487,11 +535,10 @@ fn parent_local_id(
 fn delete_vanished(
     conn: &mut Connection,
     source_id: i64,
-    type_name: &str,
-    table: &str,
     local: &HashMap<String, exchange_ews_ids::FolderRow>,
     server_ids: &[String],
-    counts: &mut TypeCounts,
+    target: DeleteTarget<'_>,
+    mut child: Option<DeleteTarget<'_>>,
 ) -> Result<(), Error> {
     let server_set: std::collections::HashSet<&str> =
         server_ids.iter().map(String::as_str).collect();
@@ -500,27 +547,62 @@ fn delete_vanished(
         .filter(|(id, _)| !server_set.contains(id.as_str()))
         .map(|(id, row)| (id.as_str(), row))
         .collect();
-    if type_name == exchange_ews_ids::MAILBOX {
+    if target.type_name == exchange_ews_ids::MAILBOX {
         vanished.sort_by_key(|(_, row)| std::cmp::Reverse(folder_depth(row, local)));
     }
     for (item_id, row) in vanished {
+        if let Some(c) = child.as_mut() {
+            delete_folder_children(conn, source_id, item_id, c)?;
+        }
         let tx = conn
             .unchecked_transaction()
             .map_err(|e| Error::Partial(e.to_string()))?;
         let result = tx.execute(
-            &format!("DELETE FROM {table} WHERE id = ?1"),
+            &format!("DELETE FROM {} WHERE id = ?1", target.table),
             params![row.local_id],
         );
         match result {
             Ok(_) => {
-                exchange_ews_ids::delete_item(&tx, source_id, type_name, item_id)
+                exchange_ews_ids::delete_item(&tx, source_id, target.type_name, item_id)
                     .map_err(|e| Error::Partial(e.to_string()))?;
                 tx.commit().map_err(|e| Error::Partial(e.to_string()))?;
-                counts.deleted += 1;
+                target.counts.deleted += 1;
             }
             Err(_) => {
                 let _ = tx.rollback();
-                counts.failed += 1;
+                target.counts.failed += 1;
+            }
+        }
+    }
+    Ok(())
+}
+
+fn delete_folder_children(
+    conn: &mut Connection,
+    source_id: i64,
+    folder_item_id: &str,
+    child: &mut DeleteTarget<'_>,
+) -> Result<(), Error> {
+    let kids = exchange_ews_ids::items_in_folder(conn, source_id, child.type_name, folder_item_id)
+        .map_err(|e| Error::Partial(e.to_string()))?;
+    for kid in kids {
+        let tx = conn
+            .unchecked_transaction()
+            .map_err(|e| Error::Partial(e.to_string()))?;
+        let deleted = tx.execute(
+            &format!("DELETE FROM {} WHERE id = ?1", child.table),
+            params![kid.local_id],
+        );
+        match deleted {
+            Ok(_) => {
+                exchange_ews_ids::delete_item(&tx, source_id, child.type_name, &kid.item_id)
+                    .map_err(|e| Error::Partial(e.to_string()))?;
+                tx.commit().map_err(|e| Error::Partial(e.to_string()))?;
+                child.counts.deleted += 1;
+            }
+            Err(_) => {
+                let _ = tx.rollback();
+                child.counts.failed += 1;
             }
         }
     }
@@ -550,6 +632,98 @@ fn folder_depth(
 mod tests {
     use super::*;
 
+    #[test]
+    fn vanished_folder_cascades_deletion_of_its_child_items() {
+        let conn = rusqlite::Connection::open_in_memory().unwrap();
+        crate::db::init::apply_schema(&conn).unwrap();
+        let sid = crate::db::sources::upsert_source(
+            &conn,
+            &crate::db::sources::SourceKey {
+                kind: "exchange_ews".to_owned(),
+                session_url: "https://x/EWS/Exchange.asmx".to_owned(),
+                account_id: "u@d".to_owned(),
+            },
+            Some("u"),
+            "u@d",
+        )
+        .unwrap();
+        conn.execute(
+            "INSERT INTO blobs (id, hash, data) VALUES (1, X'00', X'01')",
+            [],
+        )
+        .unwrap();
+        conn.execute("INSERT INTO mailboxes (id, name) VALUES (10, 'Tasks')", [])
+            .unwrap();
+        conn.execute(
+            "INSERT INTO emails (id, blob_id, received_at, mailbox_ids) VALUES (20, 1, '', '[10]')",
+            [],
+        )
+        .unwrap();
+        exchange_ews_ids::insert(
+            &conn,
+            sid,
+            exchange_ews_ids::MAILBOX,
+            "",
+            "FOLDER",
+            "CK",
+            10,
+        )
+        .unwrap();
+        exchange_ews_ids::insert(
+            &conn,
+            sid,
+            exchange_ews_ids::EMAIL,
+            "FOLDER",
+            "MAIL",
+            "CK",
+            20,
+        )
+        .unwrap();
+
+        let mut conn = conn;
+        let local =
+            exchange_ews_ids::folders_of_type(&conn, sid, exchange_ews_ids::MAILBOX).unwrap();
+        let mut folder_counts = TypeCounts::default();
+        let mut email_counts = TypeCounts::default();
+        delete_vanished(
+            &mut conn,
+            sid,
+            &local,
+            &[],
+            DeleteTarget {
+                type_name: exchange_ews_ids::MAILBOX,
+                table: "mailboxes",
+                counts: &mut folder_counts,
+            },
+            Some(DeleteTarget {
+                type_name: exchange_ews_ids::EMAIL,
+                table: "emails",
+                counts: &mut email_counts,
+            }),
+        )
+        .unwrap();
+
+        assert_eq!(folder_counts.deleted, 1);
+        assert_eq!(
+            email_counts.deleted, 1,
+            "child email must be cascade-deleted"
+        );
+        let mailboxes: i64 = conn
+            .query_row("SELECT count(*) FROM mailboxes", [], |r| r.get(0))
+            .unwrap();
+        let emails: i64 = conn
+            .query_row("SELECT count(*) FROM emails", [], |r| r.get(0))
+            .unwrap();
+        let orphan_idmap: i64 = conn
+            .query_row("SELECT count(*) FROM sync_id_exchange_ews", [], |r| {
+                r.get(0)
+            })
+            .unwrap();
+        assert_eq!(mailboxes, 0);
+        assert_eq!(emails, 0, "no orphaned email row may remain");
+        assert_eq!(orphan_idmap, 0, "both idmap rows must be removed");
+    }
+
     fn row(id: &str, parent_ews_id: &str, local_id: i64) -> exchange_ews_ids::FolderRow {
         exchange_ews_ids::FolderRow {
             item_id: id.to_owned(),