What's exactly the difference between Early Access and Public Preview?
Great question, especially since we use these terms interchangeably in some places.
Early access:
Dynamics 365 and Power Platform ship product updates in two release waves. Wave 1 is from Apr - Sep and Wave 2 is from Oct - March. All the capabilities that are automatically enabled for end users only get shipped at the start of the wave. i.e. twice a year in April and October. For all such capabilities, we provide a two month early access period (starting Feb and Aug) for admins to try them in a non-production environment first and get ready before they are enabled for end users. Admins can use this time to update any end-user facing training or documentation. These capabilities in early access are production ready, which means admins can try them in a sandbox and enable them in their production environments earlier than April and October too, as per their convenience. You can read more about early access FAQs here: docs.microsoft.com/.../release-schedule
The updates shipped in the other months (other than April and October) include new capabilities that admins can choose when to enable for their users.
Public preview:
These capabilities are pre-release features primarily provided early to seek early customer feedback. They are not meant for production use and you can find more details about terms of use here: docs.microsoft.com/.../supp-dynamics365-preview
If you try out any feature in public preview, you should wait until it is generally available (GA) before you roll it out to your users in production.
Stay up to date on forum activity by subscribing.