This entry is dedicated to cause and effect of using different settings with user credentials and UAC when using External Application settings:

Royal TS running with Admin account, UAC enabled and started not elevated:

No elevation required, no credentials used

OK

No elevation required, user credentials used

OK

No elevation required, admin credentials used

OK

Elevation required, no credentials used

UAC prompt, not embeddable

Elevation required, user credentials used

OK (limited access because of "user" credentials)

Elevation required, admin credentials used

Error (elevation required)

Royal TS running with Admin account, UAC enabled and started elevated:

No elevation required, no credentials used

OK

No elevation required, user credentials used

OK

No elevation required, admin credentials used

OK

Elevation required, no credentials used

OK

Elevation required, user credentials used

OK (limited access because of "user" credentials)

Elevation required, admin credentials used

Error (elevation required)

Note: Process tracking for processes running with a different user account as Royal TS, ensure Royal TS is also started elevated (as Administrator). Otherwise, process tracking will fail.