Case sensitive and Insensitive Query

Siebel earlier used to have one Field Level Property Use Default Senstivity. This property is obsolete now.

To provide Case Insensitive Query on the Fields, Siebel 8.1 version has introduced a CIAI (Case and Accent Insensitive). Accent Insensitive does not work in Siebel 8.1.1.2 vesrion. You can use SoundsLike Operator for the Accent based query.
On the column level, right click at Column.

Siebel will run you through a wizard and create a new column and indexes to support the Case Insensitive Query.

Note: You need to lock the project to run through the wizard.