Here I will be covering a use case which will help to get a better understanding on GROUPCASEINSENSITIVE attribute that is set in the Options File .
Sets case sensitivity for user lists. GROUPCASEINSENSITIVE OFF|ON If set to ON, user names specified with the GROUP keyword are treated as case-insensitive. By default, GROUPCASEINSENSITIVE is OFF, and user names are treated as case-sensitive.
1. There are 2 users (usera and USERA) , GROUPCASEINSENSITIVE is set to ON and DUP_GROUP is set to U , what will be the behavior of GROUPCASEINSENSITIVE with DUP_GROUP Enabled ?
Results: The usernames usera and USERA will be treated the same in the options file (as to what permissions are set), but as different usernames by the license server for license checkouts (when the DUP_GROUP is set to U so that it only checks the username).
By default DUP_GROUP is case sensitive and is not controlled by GROUPCASEINSENSITIVE ON .