We have CUCM 188.8.131.520-16 on platform 7825I3 and want to upgrade to 8.5. We've bought a new server MCS7825I4-K9-CMD2A. We want migrate CUCM to a new server and put it as publisher and keep the old server as subscriber. On the old server we have 830 authorized units.
We've got next things:
Could you help us which is our steps in implementation of above.
Thanks in advance