[Solved] Planned disruption on Skype for Business and Microsoft Teams on April 9
On Thursday, April 9 between 3 p.m. and 7 p.m., the "Skype for Business" and "Microsoft Teams" login service will be uppgraded. During this time, you may experience problems logging in to these services. If you are already logged in before the uppgrade starts, via client on your computer or on a mobile device, you should stil be able to continue using the services even during the upgrade.
This change is made to simplify future logins and modernize the login service for Office 365 services.