- Exchange the execution of cmdlet set syncmailuser failed. Refer to correlation ID . Exchange: The execution of cmdlet Set-SyncMailbox failed. The value "9755d9ab-7292-4d27-943f-0a48faca1960" of property "ExchangeGuid" is used by another recipient object. Exchange: The execution of cmdlet Enable-Mailbox failed. https://g We had a User mailbox that was converted to a shared mailbox when that user left, today I re-enabled and re-licensed that user as they have returned and now the mailbox has disappeared completely from Exchange Admin center and when you try open another mailbox from OWA. It syncs properly via AADConnect to our Azure environment and creates the O365 user and Exchange online (O365) email account. https://g Jan 16, 2025 · Hello, I needed to convert the account to a shared mailbox. I had to temporarily assign her a license because of this. jp Nov 24, 2021 · Based on the results you shared, you have an old Remote mailbox for the AD user in your Exchange server, however the online mailbox was directly assigned the EXO license to provision and failed, in this case as far as I know the problem is more likely related to the old Exchange attributes keep syncing with this new Azure AD user, and also the Sep 21, 2024 · In this article, you will learn why this happens and the solution for an Azure Active Directory call was made to keep object in sync between Azure Active Directory and Exchange Online. NullReferenceException: Object Reference was not set to an Instance of an Object" Oct 22, 2020 · The execution of cmdlet Set-SyncMailUser failed. wle2rw nwl7s gis whc o18sqw gth3 bjx sregi 5u6uv6 au