Remember the word “Transmog“? Microsoft has release an official statement on how the process will work and the bits that are required for this to happen. The official title given to this transmogrification process is called “In-Place Transition from Windows Server 2012 Essentials to Windows Server 2012 Standard.”
In a nutshell:
- Licensing. You need to purchase a copy of Server 2012 Standard AND the appropriate number of Client Access Licenses (CALs).
- **After the process. there is NO 25 user limit NOR a 75 user limit.
- There is a “supported” user and account limit of 75, which means that while the bits should work, Microsoft will not provide support for it if you exceed this limit.
- You can turn off the Essentials bits, but it is a one-way ticket. You cannot turn the features back on.
The article can be read here – http://blogs.technet.com/b/sbs/archive/2012/08/06/growing-beyond-25-users-with-windows-server-2012-essentials.aspx
**NOTE: Windows Server 2012 Essentials has a hard limit of of 25 users. After the in-place transition process, this limit is removed, because the server is transitioned to Windows Server 2012 Standard.