You will need to use different addresses if enabling multicast on both servers. I would do 126.96.36.199 for one server and leave (.3,.5,.7) for g711alaw, g729a and wideband codecs (if you ever use them) and then start at 188.8.131.52 for the other server and leave (.13,.15,.17) for the same codecs above.
Maybe for second Multicast MOH server, start at 184.108.40.206 or like 220.127.116.11.
Sankar is right, but if you add multiple audio source files and have like 4 multicast audio sources then it may start higher up for the audio source you are using.
In my time working on fixing systems I've seen people don't maintain/delete old audio sources so starting second MOH server at 18.104.22.168 could cause problems/conflicts potentially.
It would also be nice if they displayed the mcast address used for each audio source in CCMadmin so admins could see it easily without having to figure it out. Or for people who aren't aware of how the addresses increment per codec/audio source.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...