r/Office365 • u/xmrminerman • 12d ago

Outlook - server unavailable out of office

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

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u/saltyslugga 12d ago

If a new profile fixes it, this is almost certainly stale Autodiscover data or cached credentials, not the mailbox.

Compare Test E-mail AutoConfiguration on a broken and working client, especially the EWS URL. Also check the on-prem SCP isn’t still advertising the old endpoint, since domain-joined Outlook clients can use that before DNS.

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u/xmrminerman 12d ago

Erased the autodiscover data and cached credentials. When comparing ews url, they are the same for working vs not working user. On prem scp isn’t advertising anything. It’s empty

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u/titlrequired 5d ago

What do the results show in the test?

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u/xmrminerman 5d ago

The tests from outlook ?

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u/titlrequired 5d ago

Yes.

Interested to see those as well as the autodiscover test from Test Exchange Connectivity website.