Merge pull request #5852 from segmentio/retl-email-notifications

Reverse ETL FAQ update for email notifications

Author: stayseesong

src/connections/reverse-etl/index.md

@@ -303,3 +303,13 @@ Column JSON size | The maximum size of any single column value. | 128 KiB
 
 #### Why do my sync results show *No records extracted* when I select *Updated records* after I enable the mapping? 
 It's expected that when you select **Updated records** the records do not change after the first sync. During the first sync, the reverse ETL system calculates a snapshot of all the results and creates records in the `_segment_reverse_etl` schema. All the records are considered as *Added records* instead of *Updated records* at this time. The records can only meet the *Updated records* condition when the underlying values change after the first sync completes.
+
+#### Can I be notified when Reverse ETL syncs fail?
+Yes, you can sign up for Reverse ETL sync notifications.
+
+To receive Reverse ETL sync notifications: 
+1. Navigate to **Settings > User Preferences**.
+2. Select **Reverse ETL** In the **Activity Notifications** section.
+3. Enable the toggle for **Reverse ETL Sync Failed**.
+
+In case of consecutive failures, Segment sends notifications for every sync failure. Segment doesn't send notifications for partial failures.