If the folder you are in (for example, your Mailbox or Calendar) contains many items, you might have a difficult time finding the one you want. The Filter (Find Items in Folder) feature lets you list items by sender and by text in the Subject field. It also lets you display items according to specific search criteria such as received items, sent items, personal items, draft items, items in a particular category, or items with attachments.
When you use Filter, all items that do not match your search criteria are hidden from view. Filter does not actually move or delete items from the folder; it displays certain items based on the search criteria you specify. When you clear the search criteria, the hidden items are displayed again.
When you use Filter, GroupWise searches the sender, recipients, message subject, message text, and attachments for the specified word or phrase.