https://jp.fujitsu.com/platform/server/primergy/svs/pdf/maintain04-irmc-setting.pdf
初期ユーザ admin / admin
For some reason, the iRMC admin user password is lost, and you need to recover it to access the iRMC on your PRIMERGY server. The official way to reset the admin user password is to reboot the server and bring up the BIOS setup utility. Then set the "Load iRMC Default Values" option to Yes, and save the change. However this requires a system reboot.
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On Linux, you can use 'ipmitool'. Major Linux distributions have this by default, so you just need to install it if not there using yum, apt, dnf, zypper, etc. Then run the following command (the default password for admin is "admin"):$ ipmitool user set password 2 adminNow you should be able to log in to iRMC with user ID: admin and password: admin. If the ipmi drivers (ipmi_si, ipmi_msghandler, and ipmi_devintf) are not loaded to the kernel, load them first. Otherwise the above command will fail.
Masa's blog: How to reset iRMC admin password on Fujitsu PRIMERGY servers
