We are aware that some clients are currently experiencing issues authenticating into Microsoft 365 applications due to a known DUO authentication issue. Our team is actively working with DUO to resolve the issue as quickly as possible. Clients who are already authenticated should continue to have normal access.
If you are unable to authenticate your Microsoft applications, please go to office.com and sign in through the web version of Outlook. Once authenticated, Microsoft apps should open as expected.
Thank you for your patience while we continue working with DUO toward a resolution. Cetrom Support
This message has been shared with your team. If email is affected, try accessing Outlook.com. If Outlook.com is unavailable, you can always access your email via Spam.cetrom.net.
Posted Jun 24, 2026 - 16:03 UTC
This incident affects: Duo Mobile Authentication (Microsoft 365 DUO Mobile Authentication).