User CAL on Server2012R2 exeeded

Posted on 2014-08-07
Last Modified: 2014-08-07

We are running above server. Today all user can't connect to ad.
We encountered an error in eventlog that CheckEssentialsSKUUsersLimit was executed and that the maximum amount of domainuseraccounts exeeded. Windows Server 2012 R2 Essentials only support 25 domainusers....

We counted user and ended at 22.
Do we have to count all the builtin-users and other users that have been created by system (e.g. DiscoverySearchMailbox, IUSR_MY_SERVER_NAME, IWAM_MY_SERVER_NAME, ...)?
If we do, we reach 50 users.

So, is there any blocked cal? Is there any possibility to deblock old licenses (from older pc)?
What should we do?

Thanks for your help
Question by:loosain
    LVL 16

    Accepted Solution

    No those accounts you mentioned are not part of the licences, they are built in licences.

    There is no way you can unlock the 25 licence limitation, you have to do an in-place upgrade to Windows Standard 2012. The link below provide more info.

    Author Comment

    Thanks for your help,

    after rebooting all server and clients the amount of used cals seems to be right.


    Featured Post

    Highfive + Dolby Voice = No More Audio Complaints!

    Poor audio quality is one of the top reasons people don’t use video conferencing. Get the crispest, clearest audio powered by Dolby Voice in every meeting. Highfive and Dolby Voice deliver the best video conferencing and audio experience for every meeting and every room.

    Join & Write a Comment

    In my previous 24 VMware Articles (, most featured Intermediate VMware Topics. My next series of articles concentrated on topics for the VMware Novice;   If you would…
    What to do when Windows Update is not working correctly? What tools can I use to detect the cause of the malfunction problem? What does this numeric error code mean? These and other questions that you have been asking in the past are answered here (…
    In this Micro Tutorial viewers will learn how to restore single file or folder from Bare Metal backup image of their system. Tutorial shows how to restore files and folders from system backup. Often it is not needed to restore entire system when onl…
    This tutorial will walk an individual through the process of installing of Data Protection Manager on a server running Windows Server 2012 R2, including the prerequisites. Microsoft .Net 3.5 is required. To install this feature, go to Server Manager…

    755 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    21 Experts available now in Live!

    Get 1:1 Help Now