Single Up-front payment
No Software Assurance Benefits
Assigned to Physical server (with physical or virtual deployment)
SE Server+CAL or SE/EE Core licenses
90-day rule for reassignment (with exceptions for permanent hardware failure, termination of auser's employment and "Temporary reallocation for a user’s absence or a device that is out of service" (1)
Downgrade rights (any prior versions or "permitted lower editions" may be used)
No upgrade rights (since no SA)
TODO
Microsoft Volume Licensing Service Center (VLSC)
Once you have registered and signed in to the VLSC, you will be able to perform all these tasks and more:
Download licensed software
Retrieve keys for Volume Licensing software
View Microsoft licensing details for your organization
Manage Software Assurance benefits
Manage Online Services entitlements
Assign others in your organization to do any of the above tasks—or to also be an administrator.
To qualify for ESU, one of the following must be true of SQL Server...
Active Software Assurance (SA)
Active subscription license (e.g. CSP)
"License-included" via SPLA