There’s an updated (June 2024) Dynamics 365 Licensing Guide, with a lot of small tidying-up type changes which are pretty well documented in the Change Log on page 63.

The biggest change is the definition of an external user on page 43 which now states that a contractor or agent typically won’t work onsite for the customer every working day, or for more than 30 hours on average per week.

Find the updated guide here: https://bit.ly/3R8lriY.