In the JumpCloud Administrator Portal, a JumpCloud user reappears immediately after an attempted deletion.
A JumpCloud user cannot be deleted successfully if that user is selected in the "Run As" pop-up menu of any command saved under Commands in the Administrator Portal.
In the Administrator Portal, select the Commands list. There, select each command to review its Details. Check the "Run As" pop-up menu at upper right, and ensure that this user is not selected. Save any command where a change is necessary. Then, return to the Users list, and delete this user successfully.