ConnectionFailedTransientException

ConnectionFailedTransientException

We are currently receiving numerous incidents from US-based clients related to Exchange Online.

When opening a user mailbox, frequent error messages appear similar to the following:

ConnectionFailedTransientException

For affected clients, the problem is reproducible directly in Exchange Online PowerShell:

PS C:\Windows\system32> Get-MailboxAutoReplyConfiguration niels.bohr@azure.skrubbeltrang.com

Write-ErrorMessage : |Microsoft.Exchange.Data.Storage.ConnectionFailedTransientException|
Cannot open mailbox. Server = SJ0PR23233666.namprd09.prod.outlook.com, mdbGuid = 6932b323-c5e4
  -4228-8395-939812b446a0, maiboxGuid = e88e9800-c939-4224-89e4-321983ace1db
At C:\Users\adm.msk\AppData\Local\Temp\tmpEXO_i3w4gwus.dwm\tmpEXO_i3w4gwus.dwm.psm1:1205 char:13
+             Write-ErrorMessage $ErrorObject
+             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo: NotSpecified: (:) [Get-MailboxAutoReplyConfiguration], ConnectionFailedTransientException
+ FullyQualifiedErrorId : [Server=PH0PR09MB10877,RequestId=b59ad851-c78a-9b2b-ca6b-5923d4353691,
TimeStamp=Tue, 08 Oct 2024 14:47:50 GMT],Write-ErrorMessage

Microsoft has not announced any health issues, so the problem is probably not registered at this point.

We advise clients to create a ticket with Microsoft.

For further information, feel free to contact our support team.

Update, certain customers are now reporting an official statement from Microsoft in the health center:

ConnectionFailedTransientException