Mailbox restore request for archive mailbox (prem) to archive mailbox (EXO)

Hello Christoph Weste,

It's Ahmed 🙂

To restore a soft-deleted Exchange archive mailbox to an archive mailbox hosted in Exchange Online, you can use the New-MailboxRestoreRequest cmdlet with the following parameters:

-RemoteHostName: Specify the name of the Exchange server where the source mailbox is located.

-RemoteCredential: Specify the credentials to connect to the Exchange server where the source mailbox is located.

-SourceStoreMailbox: Specify the ExchangeGUID of the soft deleted archive mailbox.

-TargetMailbox: Specify the ExchangeGUID of the target cloud archive mailbox.

-RemoteDatabaseGuid: Specify the GUID of the database where the source mailbox is located.

-RemoteRestoreType: Set this parameter to DisconnectedMailbox to indicate that the source mailbox is a soft deleted mailbox.

You do not need to use the -sourceisarchive and -targetisarchive switches, as these are only used when restoring an archive mailbox to a different mailbox type (for example, restoring an archive mailbox to a primary mailbox).

Here's an example of how the cmdlet might look:

New-MailboxRestoreRequest -RemoteHostName "mail.contoso.com" -RemoteCredential $cred -SourceStoreMailbox "exchange guid of soft deleted archive mailbox" -TargetMailbox "exchange guid of cloud archive mailbox" -RemoteDatabaseGuid "guid of on-premises database" -RemoteRestoreType DisconnectedMailbox

You can then use the Get-MailboxRestoreRequest cmdlet to check the status of the restore request. If the restore request fails, you can use the Get-MailboxRestoreRequestStatistics cmdlet to view the error message and troubleshoot the issue.

I hope this helps give you some direction on how to restore a soft deleted Exchange archive mailbox to an archive mailbox hosted in Exchange Online. Let me know if you have any further questions!

Ahmed 🙂