Overview
By default insync will backup the user's active mailbox and In-Place Archive mailbox as a part of exchange online backup.
Cause
If a user has a very large In-Place Archive mailbox and if it needs to be excluded from insync backup, please follow the below steps.
Steps to exclude the Exchange online user's In-Place Archive mailbox from the backup
Excluding the user’s exchange online In-Place Archive mailbox can be acived by adding an exclusion path in the insync profile for the user in question.
User's In-Place Archive mailbox would be backed up as an “In-Place Archive” folder in Insync backup.
Please find the image of a snapshot below :
Resolution
Please find the below steps to exclude the archive mailbox:
Access the Druva console with admin credentials.
Click on M365.
Click on Profiles
Click on the profile name for which the user is a part of
Edit and enter to SasS Apps section
For Exchange online, add the exclusion path as In-Place Archive
Save.