Encrypted vSphere
vMotion
vSphere vMotion
always tries to use encryption when migrating encrypted virtual machines. You
cannot disable encrypted vMotion for encrypted virtual machines in a cluster.
For virtual machines that are not encrypted, you
can set encrypted vMotion to
Opportunistic
(use encrypted vMotion if supported) or
Required
(do not migrate if unsupported). See
Encrypted vSphere vMotion.