Updating the social icons in the Email Signature is easy! Just follow through the steps in this article and you'll be done in no time!
First, go to Settings from the Hamburger Menu.
Scroll down to Templates and select Email Signature. Open the team member's Email Signature that needs to be updated and double click the social icon. Click the Link tab and paste the URL in the URL field. Click OK.
Do the same for the other icons.
Once you are done updating the social icons, you can now click Save.
And you're done! Great job!