When you don't know the username and password or you need to change them, you can use IPMITool to perform this task along with other user management tasks from an SSH terminal windows, like PuTTY.

Listed below are the user management commands I found helpful.

Listing the iDRAC User

Command:

      ipmitool user list 2

Example:

[root@APPLIANCE14 ~]# ipmitool user list 2

ID       Name                Callin    Link Auth    IPMI Msg    Channel Priv Limit
2         root                    true      true             true              ADMINISTRATOR

Enabling the iDRAC User

Command:

      ipmitool user enable 2

Example:

[root@APPLIANCE14 ~]# ipmitool user enable 2

Disabling the iDRAC User

Command:

      ipmitool user disable 2

Example:

[root@APPLIANCE14 ~]# ipmitool user disable 2

Set the iDRAC User Password

Command:

      ipmitool user set password 2 <Password>

Example:

[root@APPLIANCE14 ~]# ipmitool user set password 2 themaster01

Rename the iDRAC Root User

Command:

      ipmitool user set name 2 <newusername>

Example:

[root@APPLIANCE14 ~]# ipmitool user set name 2 bueno

[root@APPLIANCE14 ~]# ipmitool user list 2
ID       Name                Callin    Link Auth    IPMI Msg    Channel Priv Limit
2         bueno                true      true             true              ADMINISTRATOR

Full List of Options for 'ipmitool user'

[root@APPLIANCE14 ~]# ipmitool user set name

User Commands:  summary [<channel number>]
                                       list [<channel number>]
                                       set name <user id> <username>
                                       set password <user id> [<password>]
                                       disable <user id>
                                       enable <user id>
                                       priv <user id> <privilege level> [<channel number>]
                                       test <user id> <16|20> [<password]>