Use network upload to import PST files into Office

Dear Mohamed Al-Qady

Good day!

Thank you for posting in Microsoft Community. We are happy to help!

Per your description, we understand you have a query regarding the upload of PST files. To better help assist, we would like to confirm what environment you're using, pure cloud/on-premise/hybrid environment.

Please share detailed steps on how you're importing the PST files.

We look forward to your reply.

Sincerely,

Momo

I want to import a PST file into a mailbox through the Compliance Center. It is not a hybrid Exchange environment. We only use Exchange Online. I have the same error in another tenant. Is there a general problem?

same Error here:

Failed,MRSRemoteTransientError,0,0,Archiv2021,0,Microsoft.Exchange.Net.CommunicationErrorTransientException, The call to 'net.tcp://fr2p281mb3104.deup281.prod.outlook.com/Microsoft.Exchange.MailboxReplicationService FR2P281MB3104.DEUP281.PROD.OUTLOOK.COM (15.20.5482.6 ServerCaps:3FFFFFFF ProxyCaps:03FFFFFFFFFFFFC7DD2DFDBF5FFFFFCB07EFFF legacyCaps:3FFFFFFF)' failed. Error details: Could not load file or assembly 'Azure.Core

Cyprian

Same error here!

Import stays at 0% for ages then fails with the above error.

Hello,

We are having the same issue it seems, at least since 7/19. We are unable to successfully import ANY PST files in Compliance Center > Data Lifecycle Management > Import. Import stays at 0% a long time and then fails with "Completed with errors" status message. However, upon inspection of job details, it shows Status "Failed" with 0 items imported.

Error log contains the following information:

Failed,MRSRemoteTransientError,0,0,0,Microsoft.Exchange.Net.CommunicationErrorTransientException
The call to 'net.tcp://XXXXXXXXXXXXX.XXXXXXX.prod.outlook.com/Microsoft.Exchange.MailboxReplicationService XXXXXXXXXXXXX.XXXXXXX.prod.outlook.com (15.20.5482.6 ServerCaps:3FFFFFFF
ProxyCaps:03FFFFFFFFFFFFC7DD2DFDBF5FFFFFCB07EFFF,MailboxCaps:legacyCaps:3FFFFFFF)' failed. Error details: Could not load file or assembly 'Azure.Core

Status: ProtocolError
Status code: InternalServerError (500)
X-Psws-ErrorCode: 841101
X-Psws-Exception: Microsoft.Exchange.Net.CommunicationErrorTransientException

What's very interesting is that if I run the command "Get-MailboxImportRequestStatistics ******@domain.com" to check on the status of the Import, it doesn't even register the Import Request at all.

The result is:

Write-ErrorMessage : Microsoft.Exchange.Configuration.Tasks.ManagementObjectNotFoundException No such request exists in the specified index.

And if i run "Get-MailboxImportRequest" to show a list of requested imports, there is NOTHING in the list after 7/11.

So it's as if these Import requests are just not registering at all.

I have tried using different admin accounts, different PST files, and different mailboxes - using both UPN and GUID. Everything fails. I have a support case open with Microsoft on this, but so far they have not been able to figure it out. I think this is a wider issue than they know, but hasn't been well reported yet.

Thank you,

Dave