Hi Paul,
As said Benoit, sk39345 does mention that Open Server and Vmware can be done on HA Management pair.
However, Open Server and Vmware are recognized the same way by the Check Point Database, (there are both open servers).
On Check Point training, we always remind that a Management HA should be done only on the same plateform,version, hotfix etc ...
Because even if sk39345 says Open_Server/Vmware yes. I don't think that Check Point Appliance/Vmware will be supported.
you may ask the owner of the SK to get all the scenarios
Beside, I'll build a LAB and try to see if it's technically possible first
regards,
Anthony