One thing that I hear out from customers is that the default timeout behavior of the Lync client is too short. 10 seconds to be exact. The timeout I’m referring too is when the incoming IM toast pops up and the client auto accepts the IM. This behavior was a big sore spot when introducing mobile devices where the client would auto-accept an incoming IM before the recipient could actually launch the mobile client. This resulted in lost IM history or dual IM conversations and was an unpleasant experience for the user.
So today I just learned from a fellow colleague (thanks Chris!!!) that the desktop client behavior can be modified through a registry setting.
In seconds (10-30):