Error: "Authentication failure" when trying to log into Symantec Endpoint Protection Manager console with an additional Admin account When you login to the Symantec Endpoint Protection Manager console using the Default Administrator you can login successfully However if you create a new Admin and try to login you get an error "Authentication failure" Reseting the password for the additional Admin account also does not help.
Some things that I learned that may or may not apply to anyone else having the same issue of "Authentication Failure".
Go to the drive your Endpoint Protection Manager Console is installed on (may be C:, may be D:) and then go to Program Files x86, then Symantec, then Symantec Endpoint Protection, then Tools.
In there is "resetpass.bat". You have to right-click and choose "RUN AS ADMINISTRATOR" or if you have User Account Control (UAC) turned on, you will have to turn it off. You can also browse to this from command prompt and run it from there, but again....choose to run your command prompt as administrator.
Also, you may have to run the resetpass.bat then open Services.msc and restart the SEPM service, then run the resetpass.bat again (as administrator) before it works.