MTA error: "Logon Error -2147221219 The Microsoft Exchange Server computer is not available" (4325454)

MTA error: "Logon Error -2147221219 The Microsoft Exchange Server computer is not available"

The Mail Target Agent is unable to process PRV files with and reports the error: Logon Error -2147221219 The Microsoft Exchange Server computer is not available.

2/12/2009 11:26:15 AM CSession::Logon Error -2147221219 The Microsoft Exchange Server computer is not available. Either there are network problems or the Microsoft Exchange Server computer is down for maintenance. - MAPI_E_FAILONEPROVIDER (Microsoft Exchange Server Information Store) Low level error: 0x0 File: aeWrapHelpers.h Line: 279

Mailboxes did not inherit permissions from the Mailbox Database.

Please manually apply Full Mailbox Access rights, Send-As and Receive-As extended rights for service account in order to access all the mailboxes. The following Power Shell command can be used to apply permission to all mailboxes:

Get-Mailbox | Add-MailboxPermission -user Domain\Service Account -AccessRights FullAccess
Get-Mailbox | Add-ADPermission -user Domain\Service Account -ExtendedRights Send-As
Get-Mailbox | Add-ADPermission -user Domain\Service Account -ExtendedRights Receive-As

Replace Domain\Service Account to the Migration Manager service account.

Important: the information in this article applies mostly to older versions of QMM and Exch, when permissions could be set via ADSI Edit. Even when following the documentation to apply permissions for service account through ADSI Edit and ensuring that the permission have applied to the mailbox database level, it is still a good idea to check the Full Mailbox Access Permission of mailboxes in the target exchange and verify if the service account does have