Microsoft 365 Outage Log Archive: 2026
Microsoft 365 Database Failover and Connection Backlog
A hardware failure on the primary database cluster triggered an automatic failover to the replica.
Microsoft 365 Database Failover and Connection Backlog
A hardware failure on the primary database cluster triggered an automatic failover to the replica.
Microsoft 365 Network Congestion in Transit Provider
A major tier-1 network transit provider experienced packet loss in Europe and North America.
Microsoft 365 Network Congestion in Transit Provider
A major tier-1 network transit provider experienced packet loss in Europe and North America.
Microsoft 365 API Gateway Timeout and Increased Error Rates
Engineers investigated a spike in 504 Gateway Timeout errors affecting public API endpoints.
Microsoft 365 API Gateway Timeout and Increased Error Rates
Engineers investigated a spike in 504 Gateway Timeout errors affecting public API endpoints.
Microsoft 365 API Gateway Timeout and Increased Error Rates
Engineers investigated a spike in 504 Gateway Timeout errors affecting public API endpoints.
Microsoft 365 API Gateway Timeout and Increased Error Rates
Engineers investigated a spike in 504 Gateway Timeout errors affecting public API endpoints.
Microsoft 365 Database Failover and Connection Backlog
A hardware failure on the primary database cluster triggered an automatic failover to the replica.
Microsoft 365 Network Congestion in Transit Provider
A major tier-1 network transit provider experienced packet loss in Europe and North America.
Microsoft 365 Database Failover and Connection Backlog
A hardware failure on the primary database cluster triggered an automatic failover to the replica.
Microsoft 365 Database Failover and Connection Backlog
A hardware failure on the primary database cluster triggered an automatic failover to the replica.
Microsoft 365 Network Congestion in Transit Provider
A major tier-1 network transit provider experienced packet loss in Europe and North America.
Microsoft 365 Network Congestion in Transit Provider
A major tier-1 network transit provider experienced packet loss in Europe and North America.
Microsoft 365 Database Failover and Connection Backlog
A hardware failure on the primary database cluster triggered an automatic failover to the replica.
Microsoft 365 Network Congestion in Transit Provider
A major tier-1 network transit provider experienced packet loss in Europe and North America.
Microsoft 365 API Gateway Timeout and Increased Error Rates
Engineers investigated a spike in 504 Gateway Timeout errors affecting public API endpoints.
Microsoft 365 Network Congestion in Transit Provider
A major tier-1 network transit provider experienced packet loss in Europe and North America.
Microsoft 365 Network Congestion in Transit Provider
A major tier-1 network transit provider experienced packet loss in Europe and North America.
Microsoft 365 Network Congestion in Transit Provider
A major tier-1 network transit provider experienced packet loss in Europe and North America.