UPDATE: Skype for Business Online retirement on July 31, 2021
Originally published: July 30, 2019
Updated: September 29, 2020
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Last year we announced the July 31, 2021 retirement of Skype for Business Online. After that time, the service will no longer be accessible.
To enable customers to plan and implement a successful upgrade from Skype for Business Online to Teams, Microsoft offers comprehensive guidance and resources, including a proven success framework, free instructor-led training, upgrade planning workshops, and FastTrack onboarding assistance for eligible subscriptions. There is also an extensive list of Microsoft partners who are able to assist customers with their upgrades to Teams.
The Skype consumer service and Skype for Business Server products will not be affected by the retirement of the Skype for Business Online service.
In addition to the retirement of Skype for Business Online, customers using Skype for Business Online Cloud Connector Edition and "Hybrid Voice" configurations will require changes as well. Go here to learn more.
Current Skype for Business Online customers with existing Microsoft 365 tenants will experience no change in the service up to its retirement date and may continue adding new users as needed. As of September 1, 2019, all new Microsoft 365 customers will be onboarded directly to Teams.
For more detailed information about the Skype for Business retirement, see the Teams blog.
September 29, 2020
ADDED: Skype for Business Online Cloud Connector Edition and "Hybrid Voice" configurations detail.