We have a client who is currently running Live Communications Server 2005SP1 and are wanting to move to Lync. I realize there is no direct migration path(Outside of LCS > OCS2007 > Lync) but they are content with setting up a brand new Lync organization/pool and rolling out to specific users, re-adding contacts, etc. The question is, is it possible to have both installed in the same AD forest/domain, use the same SIP username and simply remove a user from LCS pool and add them to the Lync pool and set them up with the Lync client? We would ideally like to go down this path in order to test things before rolling out the Lync client to all users. Any feedback would be appreciated!