diff --git a/app/src/main/java/eu/faircode/email/Core.java b/app/src/main/java/eu/faircode/email/Core.java
index 7f13cf5d8e..0ca8c3f24a 100644
--- a/app/src/main/java/eu/faircode/email/Core.java
+++ b/app/src/main/java/eu/faircode/email/Core.java
@@ -4594,11 +4594,11 @@ class Core {
             List<EntityRule> rules, State state, SyncStats stats) throws MessagingException, IOException {
         DB db = DB.getInstance(context);
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        boolean outlook_categories = prefs.getBoolean("outlook_categories", false);
         boolean download_headers = prefs.getBoolean("download_headers", false);
         boolean download_plain = prefs.getBoolean("download_plain", false);
         boolean notify_known = prefs.getBoolean("notify_known", false);
         boolean native_dkim = prefs.getBoolean("native_dkim", false);
-        boolean strict_alignment = prefs.getBoolean("strict_alignment", false);
         boolean experiments = prefs.getBoolean("experiments", false);
         boolean mdn = prefs.getBoolean("mdn", experiments);
         boolean pro = ActivityBilling.isPro(context);
@@ -4627,7 +4627,7 @@ class Core {
         boolean flagged = helper.getFlagged();
         boolean deleted = helper.getDeleted();
         String flags = helper.getFlags();
-        String[] keywords = helper.getKeywords(account.isOutlook());
+        String[] keywords = helper.getKeywords(outlook_categories && account.isOutlook());
         String[] labels = helper.getLabels();
         boolean update = false;
         boolean process = false;
diff --git a/app/src/main/java/eu/faircode/email/FragmentOptionsSynchronize.java b/app/src/main/java/eu/faircode/email/FragmentOptionsSynchronize.java
index edffd0199b..7356d4cc0b 100644
--- a/app/src/main/java/eu/faircode/email/FragmentOptionsSynchronize.java
+++ b/app/src/main/java/eu/faircode/email/FragmentOptionsSynchronize.java
@@ -100,6 +100,7 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
     private SwitchCompat swOutlookThread;
     private SwitchCompat swSubjectThreading;
     private TextView tvSubjectThreading;
+    private SwitchCompat swOutlookCategories;
     private SwitchCompat swSyncFolders;
     private SwitchCompat swSyncFoldersPoll;
     private SwitchCompat swSyncSharedFolders;
@@ -132,7 +133,7 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
             "schedule", "schedule_start", "schedule_end", "schedule_start_weekend", "schedule_end_weekend", "weekend",
             "sync_quick_imap", "sync_quick_pop",
             "sync_nodate", "sync_unseen", "sync_flagged", "delete_unseen", "sync_kept",
-            "gmail_thread_id", "outlook_thread_id", "subject_threading",
+            "gmail_thread_id", "outlook_thread_id", "subject_threading", "outlook_categories",
             "sync_folders", "sync_folders_poll", "sync_shared_folders", "sync_added_folders", "subscriptions",
             "check_authentication", "check_tls", "check_reply_domain", "check_mx",
             "check_blocklist", "use_blocklist", "use_blocklist_pop",
@@ -202,6 +203,7 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
         swOutlookThread = view.findViewById(R.id.swOutlookThread);
         swSubjectThreading = view.findViewById(R.id.swSubjectThreading);
         tvSubjectThreading = view.findViewById(R.id.tvSubjectThreading);
+        swOutlookCategories = view.findViewById(R.id.swOutlookCategories);
         swSyncFolders = view.findViewById(R.id.swSyncFolders);
         swSyncFoldersPoll = view.findViewById(R.id.swSyncFoldersPoll);
         swSyncSharedFolders = view.findViewById(R.id.swSyncSharedFolders);
@@ -456,6 +458,13 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
             }
         });
 
+        swOutlookCategories.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
+                prefs.edit().putBoolean("outlook_categories", checked).apply();
+            }
+        });
+
         swSyncFolders.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -690,6 +699,7 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
             swOutlookThread.setChecked(prefs.getBoolean("outlook_thread_id", false));
             swSubjectThreading.setChecked(prefs.getBoolean("subject_threading", false));
             swSubjectThreading.setEnabled(!swGmailThread.isChecked() && !swOutlookThread.isChecked());
+            swOutlookCategories.setChecked(prefs.getBoolean("outlook_categories", false));
             swSyncFolders.setChecked(prefs.getBoolean("sync_folders", true));
             swSyncFoldersPoll.setChecked(prefs.getBoolean("sync_folders_poll", false));
             swSyncFoldersPoll.setEnabled(swSyncFolders.isChecked());
diff --git a/app/src/main/res/layout/fragment_options_synchronize.xml b/app/src/main/res/layout/fragment_options_synchronize.xml
index 4f27fe68a9..c1f2ce3604 100644
--- a/app/src/main/res/layout/fragment_options_synchronize.xml
+++ b/app/src/main/res/layout/fragment_options_synchronize.xml
@@ -825,6 +825,29 @@
                     app:layout_constraintStart_toStartOf="parent"
                     app:layout_constraintTop_toBottomOf="@id/swSubjectThreading" />
 
+                <androidx.appcompat.widget.SwitchCompat
+                    android:id="@+id/swOutlookCategories"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:text="@string/title_advanced_outlook_categories"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/tvSubjectThreading"
+                    app:switchPadding="12dp" />
+
+                <TextView
+                    android:id="@+id/tvOutlookCategories"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="48dp"
+                    android:text="@string/title_advanced_outlook_categories_hint"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                    android:textStyle="italic"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/swOutlookCategories" />
+
                 <androidx.appcompat.widget.SwitchCompat
                     android:id="@+id/swSyncFolders"
                     android:layout_width="0dp"
@@ -834,7 +857,7 @@
                     android:text="@string/title_advanced_sync_folders"
                     app:layout_constraintEnd_toEndOf="parent"
                     app:layout_constraintStart_toStartOf="parent"
-                    app:layout_constraintTop_toBottomOf="@id/tvSubjectThreading"
+                    app:layout_constraintTop_toBottomOf="@id/tvOutlookCategories"
                     app:switchPadding="12dp" />
 
                 <TextView
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 93e60c63d4..7fe73222f9 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -455,6 +455,7 @@
     <string name="title_advanced_gmail_thread">Gmail message grouping style for Gmail accounts</string>
     <string name="title_advanced_outlook_thread" translatable="false">Use Outlook thread index</string>
     <string name="title_advanced_subject_threading">Group messages by sender and subject</string>
+    <string name="title_advanced_outlook_categories">Synchronize Outlook categories</string>
     <string name="title_advanced_sync_folders">Synchronize folder list</string>
     <string name="title_advanced_sync_folders_poll">Actively synchronize folder list</string>
     <string name="title_advanced_sync_shared_folders">Synchronize shared folder lists</string>
@@ -1069,6 +1070,7 @@
     <string name="title_advanced_sync_kept_hint">This will transfer extra data and consume extra battery power, especially if a lot of messages are stored on the device</string>
     <string name="title_advanced_gmail_thread_hint">This only applies to newly received messages and can break existing groups</string>
     <string name="title_advanced_subject_threading_hint">Only messages received in the last %1$d hours</string>
+    <string name="title_advanced_outlook_categories_hint">Outlook categories can only be fetched and cannot refresh automatically due to Outlook IMAP server limitations</string>
     <string name="title_advanced_sync_folders_hint">Disabling this will reduce data and battery usage somewhat, but will disable updating the list of folders too</string>
     <string name="title_advanced_poll_folders_hint">Periodically synchronize the folder list in addition to after connecting to an account</string>
     <string name="title_advanced_check_authentication_hint">This will check the results of DKIM, SPF and DMARC authentication as performed by the email server</string>