OSE - Operating System Environment. Basically, a "machine"; whether that's a dedicated physical server or a virtual machine.
Purchased via a Microsofr partner/reseller under the CSP program
Annual renewable subscriptions, billed monthly or annually by CSP partner
Aimed and SMBs
Became available around January 2021 to replace the Open License program.
No Software Assurance Benefits
SE Server+CAL or SE/EE Core licenses
90-day rule for reassignment (with exceptions for permanent hardware failure, termination of a user'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)
No mobility rights (since no SA)
No Azure Hybrid Benefit (Since no SA)
Assigned to Physical server (with physical or virtual deployment)
Virtualisation only allowed as long as the underlying hardware is dedicated to a single cusotmer.
Requires a "Microsoft Cloud Solution Provide Program Partner" between you and Microsoft.
All HA and DR OSEs also need to be licensed (since no SA).
Generally more expensive than a CSP Subscription
No Software Assurance Benefits (but some rights normally associated with SA may be included).
90-day rule for reassignment (with exceptions for permanent hardware failure, termination of a user's employment and "Temporary reallocation for a user’s absence or a device that is out of service") (1)
If you have the right subscription SKU, you may be allowed to use virtual machines on your VMware hosts (but consider how the 90-day rule above may restrict your use of fucntionality like vMotion in VMWare)
Generally less expensive than a CSP Perpetual, but more expensive than SCE (perpetual or subscription).
A MPSA is best suited to organisations with over 250 users.
Software Assurance is optional
An Open Value agreement is best suited to organisations with 5 to 499 users or devices.
No longer available.
Software Assurance is mandatory for all Enterprise Agreement licenses.
Enterprise Licenses are best suited to organisations with over 500 users.
Perpetual licenses
Subscription licenses
An Enterprise wide commitment to license every instance from one or more of the components listed below with licenses purchased through the SCE. Any perpetual licenses you already own may not be used during the term of the SCE agreement (but will still be valid for use when the SCE ends).
Core Infrastructure (Windows Server, System Center)
Application Servers (SQL Server, BizTalk Server, SharePoint Server).
Development Platform (Visual Studio Enterprise)
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