You should not have to reprovision devices going form 10.1 to 10.2.
The only scenarios that would require you to have to reprovision iOS devices would be:
- upgrading from EMM 10.2 to EMM 11
- if the Portal certificate is updated
- if the MDM certificate is updated to a new certificate with a new Apple topic.
I have a similar question I can't seem to find the answer to in the forums/online
is reprovisioning only necessary when changing major versions? (e.g., 10.0.x to 10.1.x does NOT require devices to be provisioned, but 10.x to 11.x does)
I'm asking because we have several smaller versions to catch up on and like the OP, I cannot test in a dummy environment prior to a production rollout.