Forum Discussion
The value for LegacyDN must be unique to each user.
Trying to connect user accounts with the mailboxes but I got errors like this: Connect-Mailbox -Database "Mailbox Database 0989984251" -Identity "Tomas Hermansson" The LegacyDN "/O=<org>/O...
The legacyDN of the mailbox and matches the legacyExchangeDN attribute of the user object in Microsoft Active Directory. Not sure what you did to get into this scenario. Maybe this can help to resolve: https://social.technet.microsoft.com/Forums/exchange/en-US/4474b1d4-28e1-4822-a8fe-4f468266d7f8/disconnected-mailbox-unable-to-connect-to-anther-user
