Awesome Admin Friends,

I have an administrative question for a project that has become more complicated than anticipated for my organization:

We recently upgraded to unlimited edition and have made some license changes in conjunction with this upgrade.

Specifically, we have 40 users who were previously assigned the Force.com App Subscription licenses before the switch, and we are needing to switch them all over to the Salesforce Lightning Platform licenses, which we were advised are the comparable licenses, currently.

This requires an undertaking on our end of essentially cloning all profiles and permission sets for the new licenses, transfer the users over to the new profiles, and update all record types, field level security, and everything else that is controlled by profiles/permission sets. 

Unfortunately, the ability to clone a profile and assign said clone a different license is not OOB functionality, and I am struggling to find documentation that would be helpful in speeding up this changeover. 

Could anybody suggest any resources, documentation, tools, etc. that would help guide us through this process? It is laden with many 'gotchas' and we need some basic guidance on the best way to execute this change without experiencing service interruptions for those whose license (and thus profile and permission sets) are being changed.

I appreciate your time. :)