Microsoft Dynamics CRM 2016 Update 1 brings Email Signatures as an out of the box functionality. They can be used on Users or Queues (based on Teams).
Create a new email and you will see a new icon on the email designer to insert signatures:
To create more signatures, go to Personal Settings or, as an admin, Administration => Templates section.
Administration => Templates:
Notice Email Signatures is a new entity and it is part of the security roles. So, for instance, if the Customer Service Team requires to use Email Signatures, they should have access to the Email Signature Entity. See below an example security role:
Note: My current on-line build version is : 184.108.40.2062 – DB 220.127.116.119
You can find more information in the following Microsoft CRM article: