Upgade CUCM and IMPRE and move them to a new host

[themizzz21]

Hello,

We have a 10.5(2) installation with 3 CUCM and 2 IMPRE servers. The VMs reside on a host where ESXi is at 5.5 version.

We would like to upgrade them to 12.5(1)SU6 and move them to another host where ESXi is at 6.5 version.

Because I am not at all familiar with the procedures for transferring a virtual machine from one host to another

what is the procedure to be followed regarding the copy of the VMs?

Thanks.

[b.winter]

I would recommend checking out the Cisco docs. There is a lot of information about this.

Also check out older posts, since your question was already asked multiple times, example here: https://community.cisco.com/t5/ip-telephony-and-phones/move-vms-to-new-esxi/m-p/3868023

[Roger Kallberg]

I would recommend that you move the VMs first to the new host, you do that by vMotion, and then do the upgrade to the new version. The reason for this is that there are dependencies on the newer version of the ESXi to set the guest OS prior to the upgrade of the CM or IMP. All this is outlined in the documentation that you should read before embarking on the update of the system.

[Nithin Eluvathingal]

I would recommend to use PCD. 

Using PCD you can Simply  migrate to 12.5 version on new box.

No need to upgrade and then move.