We have an UCMA appliation that opens a trusted application endpoint acting as a BOT to take incoming IM session. We found if an established IM session with a Lync client is idle for 10 minutes, the lync client the bot is talking to would drop the idle session. The next message from that lync client will start a new session. Now we'd like to stop that happening, i.e. we want the session stay alive unless we drop it from UCMA or the remote lync client really leaves the cnversation. We tried different approaches to get this going but all failed:
1> send empty message
2> change composing status
3> client policy which seems only for IM conferences
Also I done a look up the session expire timer, which is set to 20 minutes, which suggests to me the lync client drops the session manually after 10 minutes idle period.
Is there anybody having the same issue and found a solution for it?
Any help is appreciated