I've an old Mirapoint M700 Email server with label as below
Dell E07S Reg Model: E07S Reg Type: E07S001

And found the info is R410 from internet. (as below)
MARKETING NAME*: PowerEdge™ R410
REGULATORY MODEL: E07S
REGULATORY TYPE: E07S001

The hardware was preloaded Mirapoint OS for Email Server but we have switched to use O365 email now.

Does anyone know if I can install Windows server os on this hardware? So that I can use it at general windows server.

Many thanks.