I just spent an hour trawling through the MS forums and wider Internet without finding any definitive answer to my query so I'll post it here.
All users in our organization have been assigned Microsoft Business Basic licences. We have two admins who are developing our main canvas-based Power App. The two admins also have MS Business Basic licences applied as well as Microsoft Power Automate Free licences. They have been developing the app since around July last year. All our end users have Microsoft Business Basic licences, and some have Microsoft Power Automate Free licences applied although I am not sure how those got applied, they were not applied by me as the licence administrator.
Today I went to add two new end users to the organisation. I applied the usual Microsft Business Basic licences. However, when the users went to open our app they were informed they need a Power Apps licence to run the app. The app would not open until I applied a Microsoft Power Apps plan trial 2 licence to the users. This surprised me because I have not had to do this in the past and most of our users are running the app without this licence applied. What I have been able to find out is that this trial licence seems to expire after 30 days. This is concerning to me.
Does that mean all of our users will eventually lose access to the app and have to purchase a Power Apps licence?
At present we have around 80 users.
Around 40 of them have just the Microsoft Business basic licence applied.
Around another 40 have the MS BB and the MS Power Automate Free licences applied
The latest 2 have the MS BB, the MS Power Automate Free and the Power Apps plan 2 trial licences applied.