we have a BE6K setup with CUCM v9.1, IM & Presence V9.1 and Enterprice license manager (ELM) v9.1.
Does CFS require additional enhanced license ?
After adding CFS we are getting "Insufficient license" error. Is CFS not considered as a device which is part of Enhanced licensing ?
What exact version are you running?
UDP should not be counted against license if you are on 9.1.1a as it was an issue in prior version.
How many total phones do you have configured? It appears you have more phones than licenses.