Cross forest Migration - Meeting IDs and Common Area Phones

 Hi All,

I have Lync 2013 migration from L2010 on front of me and some questions has been already rised...

This one cross forest guide I have already seen..

Q1. Can I somehow save the meetings? As we all know, the migration must happend during night, so I hope the old meeting invitations still work. Do I need to do something special (DNS is well known) to save the meeting IDs from the old forest to new forest?

Q2. Common area phones, how I can do the migration over the night for them? I assume changing the DHCP settings is not enough. E.g. do I need to export the certificates and then import them back on the new forest? Is it required that someone restart the phones and put the PIN again?

Petri