How do I verify and update which account types have access to media or collections?

Can you tell me if the users in the sales group have proper access to the media they have rights to?
User wants to know if an user has access to specific media or collection.
There is a user who says that the system is not updating for them and that they haven't seen new photos.

To check the access setting at the media level, the Media library > Can edit permissions permission should be enabled on your account
Sample within a collection
- Open the collection, click into any single media, and check its Access settings. Collections are typically configured uniformly, so if the sampled media has the expected account type, the rest of the collection most likely shares the same access. If it doesn't, a bulk update is needed.
- How to change media access settings at scale?

Validate end-to-end with a test account
- Create a test user using the email-plus-alias trick (e.g. your.email+test@domain.com) assigned to the account type in question
- Log in to confirm exactly what that user sees from their perspective

Access to a collection is determined by its access settings. If a user has permission to view the media within the collection, they will be able to see the collection as well.