FIPS mode installation requires that you run the Setup.exe installer from the command line, adding a command-line option.
In a command window, change directories to the folder that include the ePO - On-prem installer.
Invoke the installer with the command
setup.exe ENABLEFIPSMODE=1.Continue with the installation.
Important
Do not change the default setting for the agent-server secure communication (ASSC) port. Leave it set as enabled on port 443. In FIPS mode, the agents communicate with the ePO - On-prem server using this ASSC secure port.