Deleting All Users in Local Users Table

When using an external, third-party service (e.g., RADIUS, LDAP, or OAuth 2.0) to authenticate and authorize users attempting to log in to the device, you may want to increase security by ensuring that the device doesn't use its Local Users table to locally authenticate users. To do this, you can remove all from the local Users table.

To delete all users in Local Users table:
1. Open the Authentication Server page (Setup menu > Administration tab > Web & CLI folder > Authentication Server), and then from the 'Local Users Table can be Empty' drop-down list, select Enable:

2. Open the Local Users table (see Configuring Management User Accounts), and then delete all the users.
If you have Master users, they can only be deleted by a Master user (including the last Master user).
Only the Security Administrator can delete the last Security Administrator.