I am about to deploy three (3) BE6000 Servers, two (2) are BE6H-M5-K9 editions and one (1) is BE6M-M4-K9 edition. They both have licences , the BE6H has 100 licences while the BE6M has 300 licences.
My questions below:
1. Can I have both the 2x BE6H and 1 x BE6M together in a CUCM cluster?
2. Can the three (3) BE6000 servers integrate together without additional requirement like hardware and licence?
3. Since they are for the same end-user, Can I transfer or combine the licences between the servers to have a total of 400 licences?
Yes it should be possible, This is an old VM Placement tool link where you can verify how much user's would be supported for the needed application http://www.cisco.com/go/vmpt. There is no need for extra hardware or license.
But to consolidate these license, you will have to put through Cisco Licensing.
Bear in mind that even if you can cluster them, the limits of the BE6K platform are still enforced if you want Cisco support, I'd reach out to your SE to confirm which would be the end capacity of that, as you're mixing H and M platforms, and the rule of thumb is that the smallest node/platform is what determines total capacity.