Salesforce Outlook Integration add-in is "auto closing"

If the Salesforce Outlook Integration add-in closes on its own after Outlook restarts, and none of the ribbon icons respond afterward, this is a known issue on the Microsoft side.

Why This Happens

Salesforce collaborated with Microsoft to investigate this issue, which has been consistently reproduced, confirming it originates on the Microsoft side.

Workaround

1. Pin the Salesforce Outlook Integration Side Panel so it stays open across restarts.
2. Ask the user to switch context by opening a different email first, then reopen the add-in — this refreshes the add-in's state and often resolves the closure.