You want anyone else in the world who uses Skype for Business to be able to find and contact you using your email address. For example, and want the people in your organization to use Skype for Business to contact people in specific businesses outside of your organization. You have users on different domains in your business.

Remember that a successful upgrade aligns technical and user readiness, so be sure to leverage our upgrade guidance as you navigate your journey to Teams. If you want to upgrade your organization to Teams yourself, we strongly recommend that you begin planning your upgrade path today.

If you haven't upgraded your Skype for Business Online users to Microsoft Teams before that date, they will be automatically scheduled for an assisted upgrade. Skype for Business Online will be retired on July 31, 2021.