Normally RFC users are setup as system users but in order for the Transport Form and Business Task screens to be processed when connecting to the domain controller the RFC user must be setup as a Service User type in this case. Alternatively, a trusted RFC connection can be setup between the development systems and the Domain Controller. This will then use the credentials of ‘Current User’ (i.e. the developer) during the connection.
To stop the SAPGUI screens from timing out when entering a Transport form or Business Task, it is recommended to increase the rdisp/max_hold_time parameter on all application servers of the Domain Controller controller and relevant SAP development systems. The recommended value for this is 360.
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