Restore from RDB showing error.

Question

Hello All,
Once user  was deleted from Exchange .
Tha user rejoin company , now new account with same name is created. He ask for old mails.
We get the backup of  databse of that time (when user was diabled in AD) restored it to RDB.
After trying to restore mails from old account from RDB to current mail account, I got below error.
" Error occurred in the step: Opening source mailbox. Failed to open mailbox by GUID with error: An unknown error has occurred."
So, I created empty test mailbox, and tried restoring  to it, still same error.
I check in RDB, that mailbox is present and stroragelimitstatus shows "mailboxdisabled".
Command i user for restor is as follows;
Restore-Mailbox -RecoveryMailbox 'username' -RecoveryDatabase 'RDB_name' -identity 'Restore-Name'  -TargetFolder 'oldaccount'
Require help on it immediately , Exchange Gurus !!!
Thanks in Advance,
Hasin Choudhary.

Answer 1

Hi Hasin,
There is no need to create a new account for this use. You can restore a deleted mailbox using the following cmdlets.
1. Please run the cmdlet below to get the detailed information of this disabled user.
Get-MailboxDatabase | Get-MailboxStatistics | Where {$_.DisconnectReason -eq "Disabled"} | fl DisplayName,MailboxGuid,LegacyDN,Database
2. Run the following cmdlet to restore this deleted user's mailbox.
New-MailboxRestoreRequest -SourceStoreMailbox xxx -SourceDatabase xxx -TargetMailbox "xxx" -AllowLegacyDNMismatch
For more information, here is a thread for your reference.
Connect or Restore a Deleted Mailbox
http://technet.microsoft.com/en-us/library/jj863438(v=exchg.150).aspx
Hope it helps.
If your issue persists and it is urgent, you can contact Microsoft Support. For your convenience:
http://support.microsoft.com/
If you still would like to handle this issue on forum, I will continue to help you.
Best regards,
Amy
Amy Wang
TechNet Community Support