This article walks you through the process of finding the SID (Security Identifier) of another user on your Windows computer.
Steps

Press ⊞ Win+X. This opens the Windows “Power User” menu in the bottom-left corner of the screen.

Click on Command Prompt (Admin). A confirmation prompt will appear.

Click on Yes. You will now see a window displaying the Command Prompt.

Type WMIC useraccount get name,sid. This command will show the security identifiers (SIDs) for all user accounts on the system.
- If you know the username, you can use the following command: wmic useraccount where name="USER" get sid (replace USER with the actual username).

Press ↵ Enter. The security identifier will be the long string of numbers displayed after each username.
