A multiuser license allows more than one developer to use the product at the same time, and also allows more than one developer to receive Priority Support as a registered user of the multiuser license.
Similarly, a developer Team-Sized support subscription package identified as Workgroup, Department, or Division allows more than one developer to receive support at the same time.
For more information, see How to add users to a multiuser license.
Once a developer has been added to a multiuser serial number, the developer is entitled to get Priority Support for that product.