Can not connect to a mailbox after reconnecting from disconnected state.

Scenario: After you reconnect a disconnected mailbox, you may receive the following error in Outlook Web App, ​ ‘Your mailbox has been disabled.’ You may also have trouble connecting to the mailbox in powershell or EMC saying the mailbox is not available.

Solution: Run the following command in Exchange Powershell: Update-StoreMailboxState -Database “db_name” -Identity “mailbox_guid”

Note: If you want to update the mailbox state for all mailboxes on a particular database

Get-MailboxStatistics -Database “db_name” | ForEach {Update-StoreMailboxState -Database $_.Database -Identity $_.MailboxGuid -Confirm:$False}