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Those admins might be complaining but they still continue to buy Microsoft:
Microsoft is aware of the situation and has hinted it's not just notifications that admins might need to worry about, because other admin tools appear to be wobbling.
Microsoft's status page for its 365 services states: "Our initial investigation indicates that a recent change may be contributing to the issue. We are reverting our change as a preliminary troubleshooting issue while continuing to analyze the gathered data."