The Select Group dialog is opened by clicking on the group hyperlink in the Group Filtering dialog:
This dialog is used to select the group from which users will be processed by the Out-of-Office Extender Service. At the top of the window, enter an appropriate Search Term, which defines the starting character(s) for the group name, and then click the Search button to locate the group or groups that match the term.
Note The dialog will locate groups in Active Directory according to the settings on the Domain Configuration dialog.
When the appropriate group is selected, click the OK button to accept it. Otherwise, click the Cancel button to close to the dialog.