Can I install Lync 2010 and Communicator 2007 (with / without R2) on the same computer

Question

Can I install and use both clients at the same time?

The goal of using both requirements is based on Lync 2010 when using Communicator 2007 in an enterprise environment. Or should a developer have two different machines / virtual machines / boot environments?

Answer 1

No - you cannot work side by side. Installing Lync will remove Communicator.

However, you can use registry hacking (unsupported, unfortunately) so that your copy of Lync can work against your OCS infrastructure. This works for R2, not 100% confident in R1.

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Communicator]"DisableServerCheck"=dword:00000001

Lync, .