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Outlook 2010 - RPC over HTTP connection to SBS 2003 - server is unavailable

A user has a laptop that I have upgraded to Outlook 2010 in order to add two Exchange email accounts.  The user also requires remote email and I have been doing this with RPC over HTTP.  Now when the user goes out of the office he gets the following error:
The server is unavailable
the email works great in the office, however when he leaves it tanks.

I can login to the server using the HTTPS:\\ and then go to OWA.

Any ideas on what could be causing this?
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Geneyes008
Asked:
Geneyes008
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1 Solution
 
josephspreiCommented:
Check the settings in outlook if its not setup to a local name that cannot be resolved via the internet.
Where is the exchange server in your office, or is it hosted somewhere else?
If its in your office you need the proper setup for it to work in the outside.
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v_9mhdrfCommented:
Please check this settings on the server and make sure that everything is in place or not.

www.petri.co.il/how-can-i-configure-rpc-over-https-on-exchange-2003-single-server-scenario.htm

Kindly check the connectivity in testexchangeconnectivity.com and please provide the output here, so that we can analyse further.

Thanks,
Mohammed
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Geneyes008Author Commented:
This was am antivirus issue.  I uninstalled McAfee, and it ran fine.  I have installed ESET and it is still working.
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Geneyes008Author Commented:
Thjis answer did not contain all of the info needed to correct the users issue.  It did help though.
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