Integrated OCS with Exchange 2010 OWA didn't work over ISA server

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Dear all,

I've problem with OCS integrated to Exchange 2010 SP1 Outlook Web App.

When I connect to OWA internally, I've got normal connection to OCS I see contacts, I can chat, etc.

But trouble is when I connect to OWA externally from internet, I can normally logon to OWA, but I don't see contacts, cannot change OCS status, IM is visible but geued out. I tried to setup diagnostic logging to expert, but nothing appear in log. Exchange OWA is published to internet through ISA (2006) server, no http filters, everything enabled but it didn't work.

Any idea why OCS in OWA work internally but not externally?

thank you


Gulab Mallah

Seems like something is blocking and it got to be ISA.
Have u had a check on it?Gulab | Skype: gulab.mallah


Yes, we checked couple of times whole publishing rule and http filtering options and there so no filter at all, everything is enabled.

Question might be if ISA 2006 is compatible with OCS over OWA?



Hi Martin,
It sounds odd, was there any issue when you used exchange 2010 RTM?
I have also run into a issue like your scenario, but just occur after apply exchange 2010 sp1.
I would do more resarch, if any new information, I would post here.


Hi Gavin,

I didn't user exchange 2010 RTM version, it was direct installation exchange 2010 sp1 and rollup 1 installed on it.

So for my case it's issue from begining.

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