Event ID - 1021

Event Id1021
SourceMicrosoft-Windows-TerminalServices-SessionBroker
DescriptionThe %1 group does not exist. To create the group, run the command tssdis.exe -install.
Event InformationAccording to Microsoft :
Cause :
This event is logged when the group does not exist.
Resolution :
Create the Session Directory Computers group
To resolve this issue, create the Session Directory Computers local group on the TS Session Broker server.
To perform this procedure, you must have membership in the local Administrators group, or you must have been delegated the appropriate authority.
To create the Session Directory Computers local group:
  1. On the TS Session Broker server, open an elevated Command Prompt window. To open an elevated Command Prompt window, click Start, point to All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
  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 elevated Command Prompt window, type tssdis.exe -install and then press ENTER.
Verify :
To verify that the Session Directory Computers local group on the TS Session Broker server is configured correctly, ensure both of the following:
  • The Session Directory Computers local group exists on the TS Session Broker server.
  • The computer accounts of the terminal servers that use the TS Session Broker server are members of the group.
To perform this procedure, you must have membership in the local Administrators group, or you must have been delegated the appropriate authority.
To check the configuration of the Session Directory Computers local group:
  1. On the TS Session Broker 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. Ensure that the Session Directory Computers group is listed.
  4. In the right pane, right-click the Session Directory Computers group, and then click Properties.
  5. Under Members, ensure that the computer accounts for all the terminal servers that use the TS Session Broker server are listed.
Reference LinksEvent ID 1021 from Source Microsoft-Windows-TerminalServices-SessionBroker

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