Outlook Out of Office not working cannot open

Question

Hello

i have few users that have issue with the OOO in outlook 2021 the OOO in OWA is working but not in outlook

we have exchange on prem what i try so far is : repair office

re do the profile, repair again office

same issue

not sure why i get this

Thanks

Answer 1

Hi @POJ ,

i have few users that have issue with the OOO in outlook 2021 the OOO in OWA is working but not in outlook

By "few users", do you mean currently it's only affecting some of the users in your environment, while the others have no issue? If so, have you noticed if there's any obvious difference between the problematic users and the others? For instance, are the affected users in a different mailbox database?

Any changes were made into the Exchange environment right prior to the occurrence of the issue?

Besides, please try testing on one machine in question by clearing the Windows Credential Manager and see if it can help. Here's one similar thread for reference: issue with outlook OOO.

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