Exchange 2010 SP1 OWA not working

HI,

I've just installed Exchange 2010 R2 as a transition from 2003 and everything seems to have gone well and I'm half way through moving across the mailboxes. The only issue I have is that I cannot access OWA via Exchange 2010 and even the 2003 OWA has stopped working.

I am currently running a casarray with NLB called cassaray.domain.org.uk and have 2 x CAS servers in it called SVREX10CH and SVREX10HC.

When I go to the configured internal owa URL for either server eg https://SVREX10CH.domain.org.uk/owa it gives a certificate warning (we don't have an SSL one yet) but then nothing.

Any help with this would be appreciated. Thanks.
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southwestsixteenAsked:
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MegaNuk3Commented:
What happens if you hit the CAS server IP address? E.g https://IPaddress/owa ?

What happens if you hit the https://CAS array name /owa ?

If you are just getting a blank page then IIsreset will probably sort that out for you
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southwestsixteenAuthor Commented:
Hi,

Sorry for the late reply.

If I hit http://casipaddress/owa then it connects ok. When I hit https://casarray/owa but not the FQDN then it connects ok. As for the 2 servers making up the CAS array, I can connect to one in the same method but the other one times out.

Also, logging into OWA takes ages if I select "this is a public computer" but is instantaneous when I select "private computer".

Not getting blank page but tried IISreset anyway.
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MegaNuk3Commented:
Hmmm, so what if you hit that CaS that is not working well from itself, does OWA work then?
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southwestsixteenAuthor Commented:
I tried it and it doesn't work.
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MegaNuk3Commented:
What error does it give?
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southwestsixteenAuthor Commented:
Error
It also shows the login box when I connect from a LAN PC. Entering in the credentials doesn't help.
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MegaNuk3Commented:
Do a get-owavirtualdirectory | fl against it
I bet forms based authentication is not on
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MegaNuk3Commented:
Compare the output of get-owavirtualdirectory | fl of the bad CAS vs the good CAS
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southwestsixteenAuthor Commented:
Thanks. I'll try it tonight and let you know.
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southwestsixteenAuthor Commented:
I checked this as you suggested and they both look identical, with forms based authentication on. I haven't set the external URL for OWA yet. Could this be related?

Also, when we configure the external OWA, will we point it to the CASARRAY which will then direct it to one of the CAS servers in the array?
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MegaNuk3Commented:
Try hit OWA from the CAS server itself. Make sure IE is set to bypass proxy fir local addresses and add the CAS names + array to the proxy exceptions list, then test.

If you get the same result then use EMC to toggle the forms based auth off --> try OWA, then put forms auth back on and try OWA again
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southwestsixteenAuthor Commented:
Hi MegaNuk3. This did not change anything unfortunately. One server is more stable so as a workaround we have configured the firewall and DNS to direct the OWA traffic to the this one server instead of the casaray.
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MegaNuk3Commented:
Logon to the faulty CAS and try and connect to OWA from the server itself and see if it gives a more elaborate error.
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southwestsixteenAuthor Commented:
Unable to resolve this issue but found a workaround. Points awarded to MegaNUk for helping. Thanks.
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MegaNuk3Commented:
Thanks for the points
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southwestsixteenAuthor Commented:
Unable to resolve this issue but found a workaround. Points awarded to MegaNUk for helping. Thanks.
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