Mailbox stay in disconnected after move mailbox process

Solution

Exchange 2010

Organization Configuration->Mailbox->RightClick to old database->;Properties
Limits Tab-;Set Keep Deleted Mailboxes to Zero (0)
and then on EMS execute the command below;
Clean-MailboxDatabase "Old Database Name"
In order to learn Database name;
Get-mailboxdatabase

Exchange 2007
Server Configuration->Mailbox->RightClick to old database->Properties
Limits Tab->Set Keep Deleted Mailboxes to Zero (0)
and then on EMS execute the command below;
Clean-MailboxDatabase "Old Database Name"
In order to learn Database name;
Get-mailboxdatabase

Exchange 2003
http://support.microsoft.com/kb/940012
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