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External connection to Exchange 2016 (owa) fails

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Hi all,


I am trying to built up the external acces to our Exchange 2016 server but I am receiving the error below.




I have checked port 443 to be open and set an external virtual directory to https://department.company.de/owa. I also tried setting the virtual directory to https://domain.de/owa but this did also not work (domain.de != company.de). The internal access is working fine. I have not requested a certificate yet because I am not sure which virtual directory to put in there. I also checked Autodiscover at the hosting provider and in the DNS.


I have the feeling that I have overlooked something but currently I have no starting point.


Any help is appreciated.


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Darf auch gern deutsch sein. Funktioniert der interne Zugriff auf owa denn?

kann natürlich mit deinem anderen Problem zusammenhängen.


im Zweifel neuen Exchange installieren, Postfächer und konfig migrieren.

Edited by NorbertFe
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