Result Count
Administrators can set a recipient-count threshold to filter the number of messages returned.
Group Filter
After entering search keywords, you can also restrict the search to a specific group. Choose whether the Sender, the Recipient, or the Sender/Recipient belongs (or does not belong) to a particular group. Enter the group path together with the domain in the field that follows, for example: /top/groupA/groupB/sales@abc.com