Summary:
You cannot connect to an Office Communications Server 2007 using an Office Communicator 2007 R2 client.
Details:
There are architectural changes introduced into Office Communicator 2007 R2 that are only compatible with Office Communications Server 2007 R2.
Workaround:
On Office Communications Server 2007, you can select to block Office Communicator 2007 R2 clients from connecting.
Right now I use office communicator 2007 R2. And it connected to OCS 2007. :-)
Welcome to "Unsupported-ville," population: you. :)
who say that it`s in production.
But... good for migration, I think
If it works, that's certainly good news.
What has happen to your developers? They have got some kind lazy -pills? Otherwise it is very hard to understand that why there are no compatibility for old server version.
It should not be rocket science to add clients a check the server version and behaves like that.
Hope you are not planning to share the pills with Office and Outlook teams!
I have R2 Client working against R1, Only issue this far are with Enterprise Voice, issue being you cannot forward or SIM ring calls anymore :-(