Lync 2013 Error “Failed while updating destination pool” migrating a user from Lync 2010 to Lync 2013

So, lets say you’ve built up a Lync 2013 installation in parallel to your existing Lync 2010.    It’s time to migrate users from Lync 2010 registrar pool to the Lync 2013 pool.   But when you do this, you get the following error “Failed while updating destination pool”   The… Continue reading