If you are using LDAP, any of the below reasons will cause LDAP authentication to not work:
If you are trying to login with a local account, such as the built-in administrator account, admin, the user name or password is incorrect.
Regardless of authentication type, make sure your credentials are being typed in the correct case, as both user name and password are case sensitive.
If you are not using LDAP, you can use any local administrator account to login and reset the password of another local administrator account.
If you are using LDAP, and no one can login using LDAP credentials, try using the built-in administrator account, admin, with whatever password you have set. Once you are in, go into Settings & Maintenance > User Authentication and make sure the LDAP server entries have the correct information. It is recommended to use an LDAP service account
If you are still unable to login to any administrator account:
If you have your License Key, you could reset the administrator password:
1. Logon to the console of the KACE SDA using the below credentials:
username: netdiag
password: netdiag
2. Type "reset_admin_password" and hit Enter.
3. The Appliance will request the last 16 characters of your license key.
The dashes count, example: XXXX-XXXXX-XXXXX
4. Proceed to specify a new Password.
If all fails proceed to contact KACE Tech Support:
https://support.quest.com/create-service-request