So I've never done this on the T320 specifically but I've done this on other models of this generation. You will want to download this and extract the .pm file from the .exe that will be downloaded. [URL] Once you have the .pm file downloaded you will log into the idrac web gui and go to the update section and direct it to the .pm file. Once done go to the job queue and wait for the job to complete. Then go to the diagnostics tab within the idrac and press the reset to default settings button and let that complete.  Once that reset has completed after a few minutes go to the server itself and do a complete reboot and it should go into a rebranding process after the POST process completes and it will reboot after. After the reboot you should start seeing Dell logos and everything should be more or less back to stock Dell.
Hello I got Dell PowerEdge T320 8x3.5", seems that all working as intended but some points don't let me sleep well: 1. My server is OEM, how i can turn it to normal one so in IDRAC i will see server model ? as i googled i find that it was possible but for other server model [URL] 2. In Lifecycle Controller i missing one menu item - Configure RAID and Deploy OS, there only gear icon and then blank space, how i can get all menu items ? [images with personal information removed by Moderator] Bios and other stuff was upgraded to latest versions  
Dell T320 OEM convert to normal