When you delete an unauthenticated access user, you must also remove the application pool entitlements for the user. You cannot delete an unauthenticated access user who is the default user.
If you delete an unauthenticated access user and if there is an existing client session for that AD user, then you must restart the client session to make the changes take effect.
- In Horizon Administrator, select Users and Groups.
- On the Unauthenticated Access tab, click Delete.
- Click OK.
What to do next
Remove application entitlements for the user. See " Remove Entitlements from a Desktop or Application Pool" in the Setting Up Published Desktops and Applications in Horizon 7 document.