November 12, 2026 1:56PM ET | Status: Investigating
Microsoft 365 Outage Affecting Riva Services
November 12, 2026 | Status: Ongoing
What Is Happening
Microsoft is investigating an Exchange Online service issue affecting mailbox connectivity for some users in the Americas. This outage may affect Riva Sync, Riva Insight, and Riva Sales Engagement features that rely on Microsoft 365 mailbox access.
Microsoft is tracking the disruption under incident references EX1550543 and MO1550821. Microsoft has advised that it is redistributing connection traffic across its worldwide infrastructure to help balance the load.
How This May Affect You
Depending on which Riva services you use and whether your Microsoft 365 mailboxes are affected, you may experience:
- Riva Sync: Delays or interruptions in synchronizing emails, calendar events, contacts, and other mailbox data.
- Riva Insight: Slow loading, errors, or interruptions when using features that access Microsoft 365 mailbox data.
- Riva Sales Engagement: Email Bursts remaining queued, taking longer to send, or displaying errors such as “Something went wrong” or “Network Error.”
The impact may vary by customer, user, and feature. Microsoft has reported issues in the Americas; the location of your users alone may not determine whether your organization is affected.
What We Are Doing
Our team is monitoring Microsoft’s incident updates and the impact across Riva services. We will update this article as more information becomes available and as we validate recovery.
What You Can Do
- Expect possible delays in synchronization and mailbox-dependent features while the outage continues.
- Consider postponing large or time-sensitive Email Bursts until service is restored.
- Avoid repeatedly retrying or resending Email Bursts while delivery status is uncertain, as this may result in duplicate messages.
- After service is restored, review Email Burst delivery status before retrying any confirmed failures.
- Follow incidents EX1550543 and MO1550821 in the Microsoft 365 admin center. If the admin center is unavailable, visit Microsoft’s service status page.
Need Help?
If you continue to experience issues after Microsoft restores service, contact Riva Support so we can review any remaining synchronization, mailbox access, or delivery issues.