The below instructions will demonstrate how you add your new company email signature to your email account:
Create and add an email signature in Outlook.com or Outlook on the web - Microsoft Support
Here is the signature template you can use - just enter your own details where necessary:
Name
Title
School is Easy (location)
This e-mail, including attachments, may contain material that is confidential and privileged, and all material contained herein is for the sole use of the intended recipient(s). All unauthorized review, reliance, distribution, disclosure, and/or use without express permission is strictly prohibited. If you are not the intended recipient, please contact the sender and delete/destroy all copies of the message.