Here is how UDC with SQL Server works:
1. Add user entries to "Users" table in SQL Server.
2. Add group entries to "Attributes" table. The column named "userid" is the key column connecting with a user entries in "Users" table.
3. Once the sync of UDC is executed, users with group information is added to Qlik Sense.
4. Now, you can use the group information in security rules.