I already have a service account created in Logins: SQL\SVC.

---CREATE ENDPOINT <endpoint_mirroring>

STATE = STARTED

AS TCP ( LISTENER_PORT = 7023 )

FOR DATABASE_MIRRORING (ROLE=PARTNER)-----

If I run above script, I think, my window authentication will be used.

So how to write query so SQL\SVC can run on both principle and mirror server?

Should I run below after the above script?

GRANT CONNECT ON ENDPOINT::Endpoint_Mirroring TO [SQL\SVC];

GO