Problem

When migrating to Office 365 or Exchange, you see the error “An error occured during UNKNOW 0 0 reading: Failed to set archive configuration: The specified folder could not be found in the store.”

Cause

Writing to archives is activated in the Office 365 connector, but archiving is not activated for the user in Office 365.

Resolution

Disable archiving in the office 365 connector or enable archiving in Office 365 for this user.