The error message, "Can't set default user - can't find information for session 0", is written to the stdlog by the domsrvr during the shutdown and during the startup of CA Service Desk Manager services whenever the "default_superuser_id" option is not installed (see Figure 1). The message is also written to the stdlog after clicking the "Install" button to install the option.
An example of the stdlog entry is:
03/27 06:33:34.81 SDMPRI domsrvr 26632 ERROR dob.c 1477 Can't set default user - can't find information for session 0
Figure 1. The default_superuser_id option is Not Installed.