Get-Mailboxdatabase is not database information from mailbox server as well as cas server

Hi,

We have recently upgraded Exchange 2010 to 2013. All the mailboxes moved to successfully to 2013.

(We have one Mailbox Server and CAS server)

Exchange 2010 servers also phased out.

Later we found the following issues in exchange 2013 .

1.Get-MailboxDatabase command got failed below error in both CAS and Mailbox Server

[PS] C:\Windows\system32>Get-MailboxDatabase
The Exchange server for the database object "Mailbox Database 0435912484" wasn't found in Active Directory Domain
Services. The object may be corrupted.
    + CategoryInfo          : InvalidOperation: (Mailbox Database 0435912484:ADObjectId) [Get-MailboxDatabase], Invali
   dOperationException
    + FullyQualifiedErrorId : [Server=MAILBOX,RequestId=11977e61-e20f-43c7-822c-88f5384b92d1,TimeStamp=12/26/2016 5:51
   :10 AM] [FailureCategory=Cmdlet-InvalidOperationException] C7B5C9B5,Microsoft.Exchange.Management.SystemConfigurat
  ionTasks.GetMailboxDatabase

2.New mailbox cannot enabled and login.

3. The mailbox database did not appeared in Outlook Web Access.

I request kindly help to resolve this issue.

Regards

Ashraf

Ashraf