We are using Outlook 365 on workstations that access an on-premises Exchange 2019 server. After a year of no issues, about a month and a half ago Outlook stopped downloading new people added to the Exchange server and its Global Address List. If I try to manually download the Global Address List (using commands in Outlook of File, Account Settings, Download Address Book), it gives the error:
"Task {email address} reported error 0x8004010F. The operation failed. An object cannot be found."
1) I checked the Global Address List on the server, and it is up-to-date. Only Outlook is out-of-date.
2) I created a new Outlook profile, and the Global Address List was up-to-date in the new Outlook profile.
In summary, Outlook can download the Global Address list when you first setup a profile, but it can't download updates after that.
Any assistance would be appreciated.
Michael






