Microsoft Teams suffered its first major worldwide outage on 18 February 2019. Users reported a failure to connect because Teams couldn’t authenticate them. The Post-Incident report for TM173756 revealed an issue with the Azure Key Vault. What’s more interesting is that the issue affected users in multiple Office 365 datacenter regions, which is not good.
The January 24-25 Azure Active Directory outage demonstrated once again how important AAD is to Office 365. Microsoft’s Post Incident Report tells us what happened to deprive 1% of the users in Europe of service. That doesn’t sound a lot, but you’d be mad if you were affected.
Microsoft’s Azure-based multi-factor authentication (MFA) service experienced a service outage on November 19. Does this mean that we should disable MFA for accounts?
An outage in a U.S. datacenter on September 4 caused problems for Azure Active Directory with a ripple effect on Office 365. It’s a good example of how cloud services depend on each other, so when one fails, another has problems.