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FatihDemir-1332 asked KaelYao-MSFT commented

Multiple owa Access

Hi,

I have 3 domain (let's call a.com, b.com, c.com) on Exchange Server 2016 and want to create multiple owa access for these different domain users. (like mail.a.com/owa, mail.b.com/owa, mail.c.com/owa)

Currently my default owa address is https://servername/owa. I tried the following articles and created iis sites and virtual directories for each one. I can't connect any of these owa addresses I mentioned above.

https://johnyassa.wordpress.com/2012/06/07/publish-multiple-owa-ecp-virtual-directories-on-one-exchange-2010-cas-server/
https://techcommunity.microsoft.com/t5/exchange-team-blog/configuring-multiple-owa-ecp-virtual-directories-on-the-exchange/ba-p/611217

How can I configure correctly this setup?

Thanks.

office-exchange-server-administration
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Hi @FatihDemir-1332

Can you access OWA using the owa addresses from internal?
If not either, what is the detailed error message in browser?

And just in case, have you created the corresponding DNS records?

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I can access owa using only https://servername/owa internally. What should I do for access with https://mail.a.com/owa ?
I created A, CNAME, TXT etc. records on DNS.

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Hi,
If you use https://mail.a.com/owa to access from internal, what is the detailed error message in browser?
For example, did it show the site is untrusted?

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