having login issues with owa

I am having a perculiar issue with loging on to  OWA on a school's server
When I am logging in from outside the school I have no probem authenticating by using either the WAN IP address or the url address.

However when I attempt to login from inside the school's LAN, I can only authenticate by using the Ip address. I have entered an A-record on the DNS server which resolves the name to the correct internal Ip address - but when i enter my credentials the system does not accept it

thanks
ioscom1Asked:
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ioscom1Connect With a Mentor Author Commented:
gentlemen
the internal domain is steuphcollege.local
i have already created a forward lookup zone called steuphemia.nsw.edu.au and I have already ceated a host Arecored called mail2 which points to the exchange server 192.168.2.6. We have also created a a-record with our hosting service so that mail2.steuphemia.nsw.edu.au is accessible from the outside. I can authenticate with no problems from outside without using the domain name either. However from inside the mail2.steuphemia.nsw.edu returns correctly the internal ip address 192.268.2.6. However Icannot authenticate 9system not acceping any credentials- on the flipside when i access http://192.168.2.6/exchange i have NO problem login
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reubstrCommented:
try using your complete email address as your user ID. You may be needing to specify a domain.
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ioscom1Author Commented:
I had already tried that which made no difference.
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reubstrCommented:
did you try, "domainname\username" ?
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murgroupCommented:
Still sounds like a DNS issue. Internally you should be able to hit https://server/owa is this 2003 or 2007?
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murgroupCommented:
whoops read the question wrong reubstr is correct. With Exchange 2007 you must put domainname\username with 2003 you did not.
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ioscom1Author Commented:
just to be clear, if it was a dns issue, i would not be able to resolve the fqdn to the internal ip address. In terms of using domain names i think i have tried all combinations:
domainname\username
username@domainname.

the question still remains (why isn't it a domain issue from the outside?)
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murgroupCommented:
Are you using the external fqdn to access it internally?
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Mark DamenConnect With a Mentor ERP System ManagerCommented:
I have used this solution below and it does work, give it a try.  I have included the link rather than explaining it myself because the author explains it well, and well its already been done!

http://www.amset.info/netadmin/split-dns.asp

Give it a read, the description at the outset describes what you are trying to do exactly!
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ioscom1Author Commented:
no solution
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