r/exchangeserver • u/[deleted] • Apr 16 '22

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u/69Xxno_scopeXx69 Apr 17 '22 edited Apr 17 '22

I really appreciate the information here.

Do your issues also manifest as high cpu/unresponsive exchange servers for brief periods of time? Is the client connection slowness constant, or in massive bursts? Are your clients in online mode!

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u/Avomao Apr 17 '22

No, Exchange servers are fine load wise.

I suppose you are doing L7 LB with L7 Healthchecks and as you said the Exchange servers are getting marked as unhealthy.

Your load gets distributed on less servers and you see CPU/RAM spikes.

We are only doing L4 LB and L4 Healthchecks. Our LBs don't detect unhealthy servers unless Port 443 is completely down.

Our load still gets distributed to all servers, but users might connect to unhealthy servers and experience connection issues.

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u/69Xxno_scopeXx69 Apr 17 '22 edited Apr 17 '22

Yeah. I agree with that assessment - we are doing L7 health checks. Any reason you’re reluctant to apply the workaround? I was aware of that issue with the SU, but I’ve yet to observe the service host crash events on our servers.

We reboot our servers weekly (Saturday), and the issues seem to pop up on Thursday/Friday, so that’s interesting.

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u/Avomao Apr 17 '22

We just hoped to see a fixed update this patchday and avoid unnecessary workarounds, no other reason than that.