To verify the release you are on with your Microsoft Endpoint Manager environment, navigate to:
1. Select, Tenant administration from the menu on the left.
2. Ensure that Tenant details is selected as shown above.
3. Look for the Service release heading on the right as shown above.
The version number here is also linked to:
which provides more granular information about what capabilities have been added to the environment.
Remember, these service updates occur regularly, so ensure you check the updates regularly.