Why can't I use Outlook Web Access from within my network?

I am running Exchange Enterprise (6.5.7638.1) on a Server 2003 R2 box.  I am able to connect to and use my webmail from outside the network with out any problems.  From within the office, however, it just hangs and eventually times out.

Any ideas on what might be causing this behavior?  

Thanks!
nhawkinsVAAsked:
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vervenetworksCommented:
Try using the internal URL  https://serverhostname/exchange
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dtranceCommented:
Are you certain the internal request is reaching the exchange the server?  It could be DNS or the vhost isn't configured to listen for requests on the correct interface.
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GundogTrainerCommented:
Are you using a proxy server?
have you tried using the IP address rather than the DNS name.

If you check the "Internet Information Services (IIS) Manager" is the default Web Site listening on all IP addresses (All Unassigned) and listening on port 80.
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Suliman Abu KharroubIT Consultant Commented:
does it work from inside the server?
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nhawkinsVAAuthor Commented:
Hi,

https://(server name)/Exchange does work but the standard webmail.domain.com doesn't on the network or from inside the Exchange box.
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GundogTrainerCommented:
OK it works from external on webmail.domain.com

inside the network can you confirm if this resolves to the public IP address or the internal one.

I suspect it resolves to the public address which would not be port forwarded for intenal IP's.

If your public DNS is hosted externaly then you could create a DNS A record for the for the Internal IP. This way it would resolve internaly to the internal address and externaly to the public IP.

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nhawkinsVAAuthor Commented:
Thanks!
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