Hey there. So I’ve been experiencing the Outlook app on both mobile and desktop no longer working using Exchange for the past couple months. The application attempts to connect and then gets me IP-banned for invalid credentials despite the same credentials working for the SoGo webUI. I’ve tried both the normal password and app passwords and neither work.
The autodiscover logs show that it is connecting multiple times and getting “Error: must be authenticated”. Eventually I get banned for 90 minutes for “<IP> matched rule id 1 (mailcow UI: Invalid password for <email_address> by <IP>)”. If I go manually to <URL>/autodiscover/autodiscover.xml, it prompts for a username and password. Providing the same password (copy and paste), successfully logs in and displays the following message (likely because I’m using my browser to access it):
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
<Response>
<Error Time="20:08:410.398908" Id="2477272013">
<ErrorCode>600</ErrorCode>
<Message>Invalid Request</Message>
<DebugData/>
</Error>
</Response>
</Autodiscover>
Logs show this as “Error: invalid or missing request data” and displays my username successfully. Which is fair and indicates a successful login. But by comparison, when Outlook connects, it shows “none” for username and the aforementioned error.
Office User-agent: Microsoft Office/16.0 (Windows NT 10.0; Microsoft Outlook 16.0.17029; Pro)
Has anyone encountered this issue? It was working perfectly fine before.
I’ve been having to use the WebUI and the Pushover API to get my mail (and notifications).
I have been having to use the Pushover API and SoGo webmail to access my email for the past little bit haha.
