Like Erik mentioned, we do not delete user accounts , we disable them. I could guess, you are trying to free up licenses. In this case, we would suggest to disable the user accounts from workbench. In case, you are going for backend update , please take care of both KNTA_USERS and KNTA_USER_PRODUCTS tables. Some times it is required to run sh kRunCachemanager.sh A for the changes to reflect.