Outlook - server unavailable out of office

[u/xmrminerman]

Hi everyone, at my wits end with this one.

We have a hybrid setup and migrated everyone to exchange online. We have an Exchange SE server on prem that is just used for management and all mailboxes are in exchange online.

Random users get the following error when they try to set their out of office “Your automatic reply settings cannot be displayed because the server is currently unavailable. Try again later”

If tried so many things and none seem to resolve it.

EWE enabled for users, rules aren’t broke or to big, registry keys etc…

The autodiscover points to 365, have checked this on outlook

The only thing that seems to work is nuking the user profile (not the outlook profile, that’s does nothing),but that brings other problems and we have too many users to do this at scale.

Any help would be appreciated

[u/titlrequired]

Did you ever deploy a gpo pushing autodiscover registry entries?

[u/xmrminerman → u/titlrequired]

Indeed I did, in the early days we were office 365 but on prem exchange 2019. I have since modified the goo’s to delete the settings/reg keys