When you are using the webclient and you need to search for data based on date in an Email Archiving index, clicking on the calendar year button will only display 20 years in the initial list (2002-2022).
By default, the default calendar in the Webclient only displays 20 years in the initial list.
This is not a defect, from the year dropdown menu in the calendar, select the oldest year. Once that is populated, it is displayed as the latest year and you will be be able to display another 20 previous years. (1992-2012). When you select 1992 then you see (1982-2002) and so on.
6.2 Service Pack 2