We have started to migrate our users from Exchange 2010 to Exchange 2013
Exchange 2010 version 14.03.0.266.01 cu11 ( December 2015)
Exchange 2013 version 15.00.1178.004 cu12 ( due to upgrade to cu13 next week)
When we move users to a Exchange 2013 databases staff who use MS Client Outlook receive multiple pop-ups similar to the below. A reboot of the user's computer, not a restart of the Outlook client , seems to resolves the issue if not creating a user's profile works
Oddly staff who are not having their mailboxes migrated also receive the pop-ups. The only thing that connects these users is that both users share a calendar of an account that is being moved.
We are running a mailbox repair on accounts before we issue the mailbox move requests and clear the move reuests as soon as they are complete.
Has anyone encountered this issue issue before?
thanks, Rob