Steps to set up email signatures on Exchange 2013:
Access your Exchange admin center. To do this open an internet browser and in the address bar type:
https://localhost/ecp
orhttps://<CASServerName>/ecp
(where
<CASServerName>
is your Client Access Server computer name) and log in using domain Administrator credentials.Go to mail flow, rules to arrive at the Exchange 2013 transport rules’ editor.