Smartsheet change history: Investigating errors using Login with Microsoft

Smartsheet reported a major incident affecting Login with Microsoft and Single Sign On ( Company Credentials ), starting 2025-10-29 16:56 UTC and resolved 2025-10-30 01:24 UTC, lasting 8 h 28 min. Customers experienced authentication errors attributed to an Azure incident and a third-party authentication provider; a fix was implemented before resolution.