You can use Outlook Web App to access your mailbox and perform many of the actions you may be used to doing in a mail client. If you are going to use OWA regularly to send and receive mail, you may need to add custom signatures to all of your outgoing messages.
Follow the instructions below to append a custom signature to each message you send.
1) First, log in to your OWA using your email address and password.
2) In the Navigation Pane at the top of the page, click Settings and then select Options.
3) In the menu on the left hand side of the page, click settings.
4) Your mail settings will appear with the signature editor at the top of the page. Enter the signature that will appear on outgoing emails and check the box next to Automatically include my signature on messages I send then click save.
Now you have entered your signature and specified that you would like to automatically include it on outgoing mail, so that it will appear on each email that you send.
For more information on how to use the Outlook Web App interface and its many features, we recommend clicking on the Help button located in the top-right corner of the OWA interface. The help button appears as a question mark (?) and contains many articles related to using Outlook Web App.