50005 – Enabling Modern Auth for Managed Tenants

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check before: 2019-12-31


Exchange, Multi-Factor Authentication, Outlook, Skype for Business


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Mac, Online, Windows Desktop, World tenant




We?re constantly improving the security of Office 365 products and services. Modern Authentication is one of the best ways of ensuring that your clients can take advantage of authentication features like multi-factor authentication (MFA) and third-party SAML identity providers. All new Office 365 tenants created on or after August 1, 2017 have Modern Authentication enabled by default in Exchange Online for all clients. We're making a change so that Modern Authentication will be enabled for the Windows Outlook client and Skype for Business client in all managed (non-federated) tenants that were created before to August 1, 2017. Those tenants already have Modern Authentication enabled for Outlook mobile, Outlook for Mac and Outlook on the Web, so there are no changes to any of those clients.

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