Hello
My CUCM use UCSC-C420-M4S2 appliance and this appliance running under vmware esxi 6.7.
I have to plan to upgrade the esxi to version 7 for this appliance, anyone know it's safe to upgrade esxi version for this appliance?
You can upgrade the versions to 7.X. If the Vmware came embedded, you can place the VMware license order through the MCE portal if the server is under contract. You must also condor upgrading the CIMC along with Vmware.
From the link below you can check the Bios Compatibility.
https://www.vmware.com/resources/compatibility/detail.php?deviceCategory=server&productid=36844
