Unmanaged Symantec Endpoint Protection client
You can uninstall the unmanaged SEP then deploy SEP from SEPM or you can import the communication setting file to the unmanaged SEP.
Export sylink.xml from SEPM and import sylink.xml to SEP
You can export communication settings from Default group or you may wish to create your own group and export the communication setting from your created group.
After you have imported the sylink.xml file SEPM has no indication that it is successful or not, nor can you see any progress bar or progress report, you just need to wait until you see this: