Showing results for Exchange Online - Microsoft 365 Developer Blog

Dec 2, 2024

Update on nested app authentication and deprecation of Exchange Online legacy tokens

David Chesnut

Earlier this year, the Office Platform Team announced that Exchange Online legacy tokens are deprecated and will be turned off. This is part of Microsoft’s Secure Future Initiative (SFI) to give organizations the tools they need in the current threat landscape. We’ll begin turning off legacy tokens in February 2025. Publishers and developers are ac...

Aug 14, 2024

Updates on deprecating legacy Exchange Online tokens for Outlook add-ins

David,

Paul

In April, we announced that Exchange tokens will be turned off by default for all tenants in October 2024. This has been updated and you should have more time to move your Outlook add-ins from Exchange tokens to NAA.