Some SEP clients are found in the wrong groups on SEPM console, from SEP client-> Troubleshooting, wrong group listed.
From SEPM console, these SEP showed as user mode instead of computer mode
Deleting these clients from SEPM doesn't work. Importing the correct sylink communication file doesn't work either.
For specific register policy, some same username PC will be registered to wrong group as user mode
Run switchusermodetocomputermod.bat tool (attached) fail with log ，
AgentManager>> deleteClient: Error->
Network error IOException: Address already in use: connect
Launch SQL Server Studio, go to sem_client table,
run SQL Script: delete from sem_client where policy_mode = 0,
which will remove all user mode client,
Restart SEPM service, then all issued client will be registered to correct group soon.
SEP 11.0.* or 12.1