Event ID - 73

Event Id73
SourceMicrosoft-Windows-TerminalServices-Licensing
DescriptionThe Terminal Server Computers local group cannot be deleted.
Win32 error code: %1!s!
Event InformationAccording to Microsoft :
Cause :
This event is logged when the Terminal Server Computers local group cannot be deleted.
Resolution :
Delete the Terminal Server Computers local group on the license server
To resolve this issue, delete the Terminal Server Computers local group on the Terminal Services license server. If the TS Licensing role service is no longer installed on the server, the Terminal Server Computers local group is no longer needed.
To perform this procedure, you must have membership in the local Administrators group, or you must have been delegated the appropriate authority.
To delete the Terminal Server Computers group:
  1. On the license server, open the Local Users and Groups snap-in. To open Local Users and Groups, click Start, click Run, type lusrmgr.msc, and then click OK.
  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 Groups.
  4. In the right pane, right-click Terminal Server Computers, click Delete, and then click Yes.
Note : If the license server is installed on an Active Directory Domain Services (AD DS) domain controller, use the Active Directory Users and Computers snap-in (dsa.msc) to delete the Terminal Server Computers group. To delete the Terminal Server Comptuers group on a domain controller, you must have membership in the Domain Admins group in AD DS, or you must have been delegated the appropriate authority. To open Active Directory Users and Computers, click Start, click Run, type dsa.msc, and then click OK.
Verify :
To verify that the Terminal Server Computers local group is correctly configured on the license server, use the Local Users and Groups snap-in.
Note : If the license server is installed on an Active Directory Domain Services (AD DS) domain controller, use the Active Directory Users and Computers snap-in to verify that the Terminal Server Computers group is properly configured. To use Active Directory Users and Computers on a domain controller, you must have membership in the Domain Admins group in AD DS, or you must have been delegated the appropriate authority. To open Active Directory Users and Computers, click Start, click Run, type dsa.msc, and then click OK.
To perform this procedure, you must have membership in the local Administrators group, or you must have been delegated the appropriate authority.
To verify that the Terminal Server Computers group is properly configured:
  1. On the license server, open the Local Users and Groups snap-in. To open Local Users and Groups, click Start, click Run, type lusrmgr.msc, and then click OK.
  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 Groups.
  4. In the right pane, the Terminal Server Computers group should be listed. If the License Server security group Group Policy setting is enabled for the license server, the group should contain a list of computer accounts for terminal servers.
Note : If the TS Licensing role service has been removed from the server, the Terminal Server Computers local group should not be listed.
Reference LinksEvent ID 73 from Source Microsoft-Windows-TerminalServices-Licensing

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