Disconnected mailboxed do not showing up Exchange 2013

After successful migration from Exchange 2010 to 2013 disconnected mailboxes are do not showing up in Connect a mailbox section.

I have created new mailbox database with test mailbox and deleted it. But in Connect To there are no disconnected mailboxes.

I tried to wait for maintenance scheduled task - there is no effect.

Also tried to run this command and no success:

Get-MailboxStatistics -Database database | ForEach { Update-StoreMailboxState -Database $_.Database -Identity $_.MailboxGuid -Confirm:$false }

because result for

Get-MailboxStatistics -Database database | Where { $_.DisconnectReason -ne $null }

is empty

Any ideas?