Using a custom action in InstallShield, I try to run the .exe file during installation in order to register a third-party service..exe must be run in administrator mode. This will need to be run in user interface mode or in silent mode. This is a set of third-party files that are deployed through our installer, but I need to execute it during the process.
I tried to execute it from "Install Exec Sequence" "After installation of files" (and also tried "After Publish Features"). In this case, I get the following dialog box:

I also tried it from the "Exec Administrator Sequence" "After InstallFiles", but this does not work at all. The program will be installed, but I need to manually run the command to make everything work.
I also have In-Script execution set to "Delayed execution" and "Return processing" set to "Synchronous (Check exit code)".
So, could I use some recommendations on where this should be done? Install Exec Sequence? Admin Exec Sequence? After what stage?
At what point is the program written out and available for execution?
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