Okay, this is 99% likely related to Collaborate and its consumption of licenses post update.
When a user is a “Security Manager” or a regular user has “allow multiple sessions” checked, multiple licenses are consumed.
When interfacing with colleagues. If they are a normal user and don’t have “allow multiple sessions” they seem to get “booted”.
We even have a user BAQ based on Collaborate notifications, and when she logs in, it consumes another license.
I’ve posted this new info to Epicor Support. Let’s see where we go.
Also, an old, somewhat related post, on Epicor: Not Enough Licenses After Update
It looks like it was fixed, but it’s been resurrected again? Don’t know. It’s a major problem for us as we are right at the license limit, sadly.