Unable to send links via Communicator R2 client

When a user tries to IM a link via communicator she gets a 400 error. I researched it a bit and the answers I got point to a bad locatin profile, but we don't use location profiles. She uses OCS 2007 R2 client and Outlook 2007. Exchange is 2007 SP1. Attached a scheenshot of the error.

A link in the erro sent me here: http://office.microsoft.com/client/helppreview.aspx?AssetID=HA103556511033&ns=COMM2007R2&lcid=1033

Thank you
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BusbarSolutions ArchitectCommented:
have you by any chance configure the IIMF to disallow URLs, or it is corrupted somehow, try disabling IIMF, restart the FE services and let us see how it works

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cyberleo2000Author Commented:
I would think that would affect all users rather than just a handful. I'll give it a shot though. Thanks.
cyberleo2000Author Commented:
I found additional info elsewhere
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