OCS Reverse Proxy – How do I now it's working ?

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  According to the OCS deployment docs, you need a reverse proxy of some kind in order to publish out meeting related content, like your slides, documents, whiteboard contents, etc. It doesn’t matter if you use ISA (preferred) or anything else(Apache, etc) to publish this out, but how do you know your reverse proxy’s working […]

OCS/Communicator – Cannot Synchronize Address Book

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When I opened Communicator I received a "Cannot Synchronize Address Book" message with additional detail of "Cannot synchronize with the corporate address book. The cause of the problem is unknown. Please contact your system administrator with this information." I had this issue occur internally, i.e. on a local LAN/WAN and not from the Internet, and […]

Forgot to specify your reverse proxy during OCS setup?

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If you forgot to do this during setup, or you just plain didn’t know what the external name was going to be and now addressbook lookups don’t work from the outside, there is hope! LCSCMD to the rescue. You may find this under \Program Files\Common Files\Microsoft Office Communications Server 2007\ The command line for changing […]

OCS – SIP – TCP – UDP

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If you don’t know – OCS talks SIP over TCP. Why is this a big deal ? Most open source implementations like SIP over UDP for performance reasons amongst others. While I’ve fielded a lot of flack on the SIP over TCP implementation, the OCS team have an awesome blog entry on why they made […]

OCS Address Book Empty?

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OCS is GREAT when you understand how it works. These two posts will save you loads of pain, and answers questions like: Why is my address book empty when I’ve JUST SIP enabled all users? Why do I get annoying authentication messages in Communicator, etc Check these out http://blogs.technet.com/uc/archive/2007/01/10/live-communications-server-2005-address-book-service-faq-troubleshooting.aspx and http://communicationsserverteam.com/archive/2007/12/17/52.aspx When you’re trying to […]

MVP Interop Event Happening

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I’m going to be part of Interop in South Africa. Essentially it’s a meeting between ourselves and the open source community to share how we can play together nicely. I do believe I’m going to be the only one waving the infrastructure flag, but I’m happy to take questions on anything. Things I’m playing with […]