MSFT-thommck ,
Thanks for the information. I did a quick look at the document, but I have a couple of questions that I'm hoping you can answer for me:
- The Purview system seems to be a LOT more than the AIP P1. We don't want/need data governance. We are a very small company. (i.e 2 consultants) Designing a reasonable data governance rule set would be a large task and likely give a false sense of compliance while not be being more effective than us hitting an encrypt key when we feel it is necessary. Does Purview have a similar "Encrypt" button that shows up on the toolbar when activated like the OME in AIP P1 did? (i.e. Can you easily make a manual decision to encrypt a message?)
- We have Microsoft 365 Business Basic and one legacy Office 365 E1 license (mine) that I plan to move to business basic one day when I have the time. Keeping in mind our current licenses and our need for just simple "on demand" e-mail encryption, which would be the most cost effective license to move to or add-on to add? The $2/user cost of AIP P1 was one of the major draws to using the Microsoft service instead of some third party, so I'm hoping that there is a similarly priced option as with most small businesses, cost is a critical factor in everything we do.
I've been dealing with MS Sales and MS Support on multiple tickets and no one has given me a straight answer for almost 2 months now. My most recent email indicated that " If you’re using any of the following plans, you can also add Azure Information Protection Plan 1 to receive Microsoft Purview Message Encryption..." I don't think they got the memo that the AIP P1 add-on is no longer available or at very least it doesn't show up in my Purchase Services screen. I hope you don't mind that I'm going to forward the subscription and billing rep a link to this page. It is weird that the AIP P1 (trial) is still available and is what started me down this path.
Your expertise and help is greatly appreciated and has helped me move toward a solution from this multi-month goose chase. 
Jeff