Do these people not know how their own system works? Shouldn't you be able to look at the state of your server? Is it resource starved? Run out of ram? Processes hung? Too much network traffic? Too much swapping? Crashed? BSOD?
"...Current status: While the servers we've returned to service initially remain healthy, we've observed that they can become unresponsive again once they begin receiving traffic. We're analyzing diagnostic data from these servers with our networking and platform experts to determine what's triggering this behavior.
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https://status.cloud.microsoft/m365/referrer=serviceStatusRedirect
@ai6yr Wrong question. The correct question I think should be: Do we ever want a time where 90% of our personnel should have to know how our system operates?