To change the signature to any user in your domain go to Your Domain -> Users:
Then search for the user you want to change the signature for - you can search by primary email and full name by typing it in the search box (1).
After clicking on the magnifier glass icon or pressing Enter the search will be performed and the result will be presented in table (2):
Next step is to click on Edit signature icon for selected user in Actions column:
You will be redirected to the screen where you can change the signature. On this screen, you can:
(1)See what signature is currently set up for the email that is in use by user(2)change the signature (both in the graphical editor and as an HTML by clicking
icon)(3)update the signature.
After clicking Update signature (3) the signature will be updated and a success message is shown. That is all - you have updated the signature!
