Most of the time, AgilePoint System Account is used to mean the same thing as AgilePoint Service Account. And most of the time, Service Account is the preferred term over System Account. However, AgilePoint System Account is sometimes used specifically to refer to the administrator account for AgilePoint Server. When you installAgilePoint NX OnPremises or AgilePoint NX PrivateCloud, by default the AgilePoint Service Account and the AgilePoint System Account have the same credentials. However, these credentials can be separated after installation. For this reason, System Account is sometimes used to specify this AgilePoint Server administrator account.
To simplify administration, and to avoid confusion between these two account types, AgilePoint recommends keeping the credentials for the Service Account and System Account the same.