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  • Need some help with email client Outlook from a Microsoft 365 subscription

Basically, this how-to is no longer up to date as far as I can see: mailcow.github.io Icon Microsoft Outlook - mailcow: dockerized documentation

mailcow.github.io Icon mailcow.github.io
Microsoft Outlook - mailcow: dockerized documentation
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I open Outlook, enter my email address, click next and then I can select the type of account. Neither Exchange nor Exchange 2013 or earlier work, both times I see the error “something went wrong” setting it up manually obviously works.

If I visit my mailcow admin dashboard and go to configuration => mail setup then check the DNS, all those setting have a green check mark.

What could I be missing?

  • apio-sys replied to this.

  • Hey ovizii,

    since the introduction of Office 365, Outlook behaves in a strange way. It always tries to connect to it’s own servers and ignores the auto discover rules.

    There is a solution to this though.

    You have to create a new registry entry which tells Outlook that it’s not supposed to check for Office 365.

    reg add HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook\AutoDiscover /t REG_DWORD /v ExcludeExplicitO365Endpoint /d 1

    Set-ItemProperty -Path “HKCU:\Software\Microsoft\Office\16.0\Outlook\AutoDiscover” -Name ‘ExcludeExplicitO365Endpoint’ -Value 1 -Type DWORD –Force
    https://medium.com/jj365/outlook-issue-with-direct-connect-to-office365-352dd29de6

    Hey ovizii,

    since the introduction of Office 365, Outlook behaves in a strange way. It always tries to connect to it’s own servers and ignores the auto discover rules.

    There is a solution to this though.

    You have to create a new registry entry which tells Outlook that it’s not supposed to check for Office 365.

    reg add HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook\AutoDiscover /t REG_DWORD /v ExcludeExplicitO365Endpoint /d 1

    Set-ItemProperty -Path “HKCU:\Software\Microsoft\Office\16.0\Outlook\AutoDiscover” -Name ‘ExcludeExplicitO365Endpoint’ -Value 1 -Type DWORD –Force
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      4 years later

      I recently ran into this issue as well ovizii when helping to setup a client with OL365. I don’t use that myself and the mailcow server works as expected otherwise on all platforms. In fact the documentation is still up2date, since rather than adding an account through the “wizard” which indeed will crash, you should go into profiles and set it up manually through there. Or as stipulated in the doc, you can manually launch C:\Program Files\Microsoft Office\root\Office16\OLCFG.EXE (or a similar path depending on your environment) which brings you to the profile setup screen. Selecting Exchange/EAS from there did work for me on an OL365 client without issues. Only issue I can see remaining here is that there is calendar sync issues. Everything comes down but something entered manually through OL365 won’t go up. But that might depend on the exact OL version since there have been quite a few updates since. Seems like a better solution to me than fiddling around with regedit…

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