Disable the Select the user on Admin for activities

[richard@AA]

Is there a way we can disable the Select the user option on the Cognos Admin page for (past, current and Upcoming) activities? We has a rather large Corp LDAP system and if you search incorrectly you can lock your account (unable to get into Cognos for 4-24 hours, without a complete environment restart) and this some how causes issues with schedules as well. We see in the logs errors for The XTS processor is currently locked by one of the administration operations. We think the root cause of the errors is the bad search. thanks!