Event ID - 4100

Event Id4100
SourceMicrosoft-Windows-TerminalServices-Licensing
DescriptionThe TS Licensing database might be corrupted. To resolve this issue, ensure that the required groups are granted the correct permissions to the LServer directory. If the problem persists, rebuild the TS Licensing database and call the Microsoft Clearinghouse. When you call the Clearinghouse, ensure that your License Purchase Agreement information is readily available.
Event InformationAccording to Microsoft :
Cause :
This event is logged when the TS Licensing database might be corrupted.
Resolution :
Check database folder permissions, and if necessary, rebuild the TS Licensing database
To resolve this issue, assign the appropriate permissions to the TS Licensing database folder on the Terminal Services license server.
If the problem persists after assigning the appropriate permissions, rebuild the TS Licensing database on the license server.
To perform these procedures, you must have membership in the local Administrators group, or you must have been delegated the appropriate authority.
Locate the TS Licensing database
By default, the TS Licensing database is located in the %systemroot%\system32\lserver folder (where %systemroot% is the folder in which the operating system is installed, which is, by default, c:\windows).
To confirm the location of the TS Licensing database:
  • On the license server, open TS Licensing Manager. To open TS Licensing Manager, click Start, point to Administrative Tools, point to Terminal Services, and then click TS Licensing Manager.
  • If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  • In the left pane, click All Servers, click the name of the license server, and then on the Action menu, click Review Configuration.
  • The database location is listed at the top of the Configuration dialog box.Assign permissions to the TS Licensing database folder
    To assign permissions to the database folder:
    1. On the license sever, use Windows Explorer to navigate to the folder containing the TS Licensing database.
    2. Right-click the folder, and then click Properties.
    3. On the Security tab, click Advanced.
    4. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
    5. Click either Add or Edit to change the permissions. SYSTEM, NETWORK SERVICE, Administrators, and TermServLicensing should each have Full Control permissions and those permissions must apply to This folder, subfolders and files.
      Note : To add TermServLicensing, ensure that the computer name is listed in From this location, and then in the Enter the object name to select box, type NT Service\TermServLicensing.
    6. When you are finished assigning the correct permissions, click OK.
    Rebuild the TS Licensing database on the license server
    To rebuild the TS Licensing database, do the following:
    • Stop the Terminal Services Licensing service.
    • Rename the folder that contains the TS Licensing database.
    • Create a new folder for the TS Licensing database.
    • Start the Terminal Services Licensing service.
    After the TS Licensing database is rebuilt, reinstall the Terminal Services client access licenses (TS CALs) onto the license server.
    To perform these procedures, you must have membership in the local Administrators group, or you must have been delegated the appropriate authority.
    Locate the TS Licensing database
    By default, the TS Licensing database is located in the %systemroot%\system32\lserver folder (where %systemroot% is the folder in which the operating system is installed, which is, by default, c:\windows).
    To confirm the location of the TS Licensing database:
    1. On the license server, open TS Licensing Manager. To open TS Licensing Manager, click Start, point to Administrative Tools, point to Terminal Services, and then click TS Licensing Manager.
    2. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
    3. In the left pane, click All Servers, click the name of the license server, and then on the Action menu, click Review Configuration.
    4. The database location is listed at the top of the Configuration dialog box.
    Rebuild the TS Licensing database
    To rebuild the TS Licensing database:
    1. On the license server, close TS Licensing Manager if it is open.
    2. On the license server, open the Services snap-in. To open the Services snap-in, click Start, point to Administrative Tools, and then click Services.
    3. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
    4. In the Services pane, right-click Terminal Services Licensing, and then click Properties.
    5. Under Service status, click Stop.
    6. Confirm that the Services Status is listed as Stopped, and then click OK to close the Terminal Services Licensing Properties dialog box.
    7. On the license sever, use Windows Explorer to navigate to the folder containing the TS Licensing database.
    8. Right-click the folder, click Rename, type lserverold, and then press ENTER.
    9. On the File menu, point to New, and then click Folder.
    10. Type the original name of the TS Licensing database folder, and then press ENTER.
    11. Open the Services snap-in.
    12. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
    13. In the Services pane, right-click Terminal Services Licensing, and then click Properties.
    14. Under Service status, click Start.
    15. Confirm that the Services Status is listed as Started, and then click OK to close the Terminal Services Licensing Properties dialog box.
    Reinstall the Terminal Services client access licenses (TS CALs) by using the telephone method
    To reinstall TS CALs by using the telephone method:
    1. On the license server, open TS Licensing Manager. To open TS Licensing Manager, click Start, point to Administrative Tools, point to Terminal Services, and then click TS Licensing Manager.
    2. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
    3. In the left pane, click All Servers, click the name of the license server, and then on the View menu, click Properties.
    4. On the Connection Method tab, in the Connection method list, select Telephone.
    5. In the Select Country or Region list, select the appropriate country/region.
    6. Click OK to close the Properties dialog box.
    7. Right-click the license server, and then click Install Licenses.
    8. Click Next.
    9. On the Obtain client license key pack page, use the telephone number that is displayed to call the Microsoft Clearinghouse, and give the representative your Terminal Services license server ID and the required information for the licensing program through which you purchased your TS CALs. The representative then processes your request to install TS CALs, and gives you a unique ID for the TS CALs. This unique ID is referred to as the license key pack ID.
    10. In the Install Licenses Wizard, on the Obtain client license key pack page, enter the license key pack ID provided by the representative into the boxes provided, and then click Next. The TS CALs are installed onto the license server.
    11. To complete the process, click Finish. The license server can now issue TS CALs to clients that connect to a terminal server.
    • Reference LinksEvent ID 4100 from Source Microsoft-Windows-TerminalServices-Licensing

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