Firstly, thanks. Thanks for recognising the need for clarification. Like most things IT, everything is simple if you know how to do it and you do it often. The people I support ( teachers, pupils, support staff) come to me with problems and I mostly know exactly how to fix them, or how to find out how to fix them. I've been working with O365 since it appeared but as it evolves there is more and more that needs to be learned. I was excited when I discovered AIP and started using it straight away.
I rolled out the scanner to all of our storage and left it to do its work. I read some more and then rolled out the client. This gave me a protection tile on the ribbon and an option to show the Bar. But the Bar just says Sensitivity: Not set. I read some more, and then a lot more, and discovered the label deployment hidden away in O365, set this and sat back to wait. Nothing happened. I read some more and discovered I needed to spend £1k on P1 licenses for some staff, so cap in hand and a bended knee later I got the licences.
The net result of all this is that over a year later I still have a bar with Sensitivity: Not set.
So, saying deploying AIP is simple could be true if anyone had detailed a list of the steps needed to deploy it, instead of producing document after document explaining the management steps that need to be taken to think about deploying it. Having documentation explaining assembling a team to think about deploying it in a large organisation is probably a great idea. But I am the only member of this team.
So, a list of steps to set it up, and a list of further reading, if there is time, would be on my wish list.