When a new version of the Add-in is made available, Microsoft may not apply it automatically. In this case, a manual action by the Microsoft 365 administrator is required to approve this update.

How do I know if an update to the Boost My Mail Add-in is available and pending? 

• As a Microsoft 365 administrator, go to the Settings tab in the administration centre, then select Integrated apps. 
• Search for the Boost My Mail Add-in. If its status shows "Updates pending", your action is required. 

How do I accept a pending Add-in update?

• Click the Boost My Mail Add-in, then click "Learn more and update".

• Then click "Accept and update".

• Once the update has been accepted, the Add-in status changes to "OK".

It may take up to 72 hours for the update to be fully deployed in Outlook for all users.