Create an Email Signature in Your Outlook Mobile App 

Step 1: Open the Outlook app, then tap your profile icon in the upper-left corner. (In older iOS versions, tap the three-line menu.)

Step 2: Click the settings gear icon in the bottom left corner of the navigation menu.

Step 3: Once in settings, scroll down to the Mail section and tap Signature.

    a. Make sure that Per Account Signature is greyed out indicating it is off.  

                Per Account lets you use different signatures for all the accounts you have setup on your phone.   We generally 

                only have our Willoway emails so we turn it off.  If you needed to have different signature files for different                              accounts, you'd turn this on.

    b.  Enter you Signature and and then tap the < pointer in the top left corner to save.

Step 4. Verify that your new signature setting has been saved by creating a new message.