Display of RFC logon screen in SM51

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Symptom
When you execute remote function calls, the RFC logon screen is displayed for the logon to the selected application server. The same applies when you execute one of the functions of transaction SM51 (for example, Release Info).
Otherwise, the entries CALL_FUNCTION_SIGNON_REJECTED or CALL_FUNCTION_SYSCALL_ONLY are made in the system log (transaction SM21) and in [...]