remove external authentication server in a bizhub C308

[Roronoa Zoro]

I have a machine that when I try to test it to use MFP authentication, it won't let me use it because it has the external mail server activated and I can't disable it.
I've already tried restarting the computer, initializing it, and I did a logical format and it doesn't go away. Is there anything I can do?

[Black Cloud]

[Utility]

• [Administrator Settings]
  • [User Authentication/Account Track]
    • [External Server Settings]
      • [Select Server]
      • Hit Delete

[Roronoa Zoro]

still continues

[Duplicator]

still continues

Have you tried a "Clear all data" in service mode?