I looked at all kinds of SAP GUI dialogs, I don't think you can remove it.
Now, as it's specific to a window displayed right after the login page, I have these thoughts:
- Better ask SAP Support or SAP Consulting.
- Another workaround is maybe to change the standard when the new mode opens, if your custom "2FA" dialog is still open somewhere, run SYST_LOGOFF.
- Otherwise call a home-made synchronous Windows dialog via cl_gui_frontend_services=>execute ... synchronous = 'X'.
- Setting temporarily the maximum number of external sessions to 1 is of course not a valid workaround.
- You must also forbid the equivalent SAP GUI Shortcuts like /O and so on, otherwise the use would drag and drop it on the dialog.
- Think about /H. I guess that maybe debug-authorized people on production systems may be considered as trustworthy.
NB: as Matthew suggested, I thought it was something clear to everyone that companies should trust only well-established software security companies, not develop custom solutions. Of course, I understand that your code is located behind user and password, but again be very careful to not permit anybody to break security or access private/confidential information, and not negotiable you should ask a security company to check what you have developed.
