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Sometimes Microsoft outlook or graph API return HTTP 503 ResourceUnhealthy error response for specific mailboxes. The description mentions: ResourceUnhealthy SystemMemoryProtectionUtilizationMonitor is unhealthy

What does it means and what may cause this specific "ResourceUnhealthy" case ?

Uria W
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  • It's telling the given service reports back that the given mailbox has issues or its related services. Just make sure you can repro the issue with Graph Explorer or POSTMAN. If yes, then please open a support ticket with Microsoft through Office 365 portal and report the issue. – Dev May 10 '21 at 10:44
  • @Dev - I don't think it's reproducible because it's intermittent -- presumably based on changing state on the graph sever. – Tim Scott Jun 29 '21 at 15:16
  • aah, if the issue is intermittent then its tough to trace. Still i would suggest you to check with Microsoft Support to see if there is anything specific to the given tenant or not. – Dev Jul 02 '21 at 14:27
  • When you get back the response, within the body you'll find some trace ID information. If you open up a ticket with this specific information, MS can check their logs for this specific request and find out the issue at this specific request. By the way, this specific error seems to appear every now and then. Best way would be to handle it similar to a 429er and retry it after a few seconds. – Oliver May 24 '22 at 08:52

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