If you are using Office 365:
Q: Are there any requirements for using the Outlook Add-in?
A: Yes.
Q. How do I get the add-in?
A: If you have Hosted Exchange and Online Meeting with us then you will automatically be provisioned the Outlook Add-in. Just open Outlook or OWA and the add-in will be there.
Q: Why do I see a pop up to allow the add-in?
A: Your operating system wants you to grant permission to run the add-in. It is a normal security feature.
Click Allow:
Q: Are there any other known issues?
A: There are 2 known issues with OWA (Outlook Webmail):