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i can access OWA from localhost and from internet but not from LAN on Exchange 2010


we use a sbs2011 with exchange 2010. Everything worked fine till some days ago. All users are not able to use the "automatic replies" (out of office assistent). It says that the server isn´t there. Outlook still works fine. So i tried to access the webaccess. From the server i can access owa with https://ip/owa , https://servername/owa and https://localhost/owa.
From Internet it works to with https://dyndns/owa.
But from every client in LAN (XP and Win7) i get the "The page could not be shown"-message in the browser.

Any ideas ?

Thanks in advance

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Last Comment

8/22/2022 - Mon
Jeffrey Kane - TechSoEasy

There are two possible causes for this, first check out:

If that isn't the problem, then there is something wrong with your autodiscover service which is usually caused by incorrect DNS settings or an improperly named SSL cert.  However, I'm assuming that it's the .NET issue because you aren't experiencing the problem universally.


Do a nslookup on the clients to check if the "servername" or "domainname" gets resolved correctly. If not, you can add an A record in your DNS to fix it.
Jeffrey Kane - TechSoEasy

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