Message from the Message Center (test tenant):
Microsoft Teams is ready for your organization - you can begin your upgrade today:
Microsoft Teams now provides the same presence, chat, voice, video and meetings capabilities as Skype for Business as part of Office 365. Teams is the new communications client in Office 365 replacing Skype for Business over time. Microsoft is committed to supporting your organization’s upgrade to Teams. To make the process as easy as possible, Microsoft will automatically upgrade your users to Teams on Thursday, November 29, 2018.
On Thursday, November 29, 2018, Microsoft will automatically upgrade your users from Skype for Business to Teams. Once upgraded, Teams will become your organization's default client for chat, voice, video and meetings in Office 365.
If you’re not ready to upgrade to Teams by Thursday, November 29, 2018, contact https://support.office.com/en-us/article/Contact-support-for-business-products-Admin-Help-32a17ca7-6fa0-4870-8a8d-e25ba4ccfd4b#ID0EAADAAA=online. Otherwise, we will upgrade your organization to Teams on your behalf.