Disclaimers are an optional feature: consult your administrator to see if they are enabled for your system.
Disclaimers are standard pieces of content that appear at the end of your emails. For environments where outbound mail goes through Essentials and for which disclaimers are enabled, you can define a disclaimer to be added to all your outbound messages.
If you do not define your own disclaimer, the one associated with your company or, if you belong to a group, the one associated with that group, will be used.