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Error 503: Can't connect to exchange server via Outlook mobile

Jona De Sacco
Last Modified: 2020-06-29
Good morning,

I have a weird error with my exchange server.
Outlook and OWA work just fine. Sending and receiving mails works. The only thing that doesnt work is connecting to the exchange server with Outlook for my phone. Everytime I try to add my mailbox in Outlook it gives me the error-message "The service is currently unavailable. Try again. If the error persists, please contact customer support. (503)"
This error only occurs with Outlook for mobile and other mail apps for the phone.

I've looked through some support forums but haven't found a solution for this problem. Does anybody have an idea what I should do?
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