The purpose of the section "User Agent Filter" is to specify when to allow or deny logon based on the agent used by the user agent.
This setting determines if user authentication is required when logon attempts are made the matching agent;
This setting allows you to list the agents that this policy will apply to;;
The user agent are listed ass a text string (regular expressions are supported).
e.g. (MacOutlook|Apple-iPhone6C) will match both "MacOutlook" and "Apple-iPhone6C"