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...
If you are trying to connect a disconnected mailbox to a different account with a different legacyExchangeDN than the mailbox originally had, use connect-mailbox with AllowLegacyDNMismatch switch which will bypass this legacyExchangeDN check.