Microsoft's Office 365 online service has not had a good week. A number of customers could not access parts of the service for two extended periods in the past week. One outage occurred on November 8th and the other happened on Tuesday. Both incidents affected the Office 365 Exchange Online mail service.
In a new post on the Office 365 blog, Microsoft's Rajesh Jha, who leads the Office 365 engineering team, states:
I'd like to apologize to you, our customers and partners, for the obvious inconveniences these issues caused. We know that email is a critical part of your business communication, and my team and I fully recognize our responsibility as your partner and service provider. We will provide a post mortem, and will also provide additional updates on how our service level agreement (SLA) was impacted. We will be proactively issuing a service credit to our impacted customers.
The blog also offers up explanations for the two outages. The one that happened on November 8th was based on issues with the anti-virus solution in Office 365. The outage that occurred on Tuesday was due to a number of different factors, including " ... maintenance, network element failures, and increased load on the service." Jha added, "Across the organization, we are executing a full review of our processes to proactively identify further actions needed to avoid these situations."