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Shahid Rafiq

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Exchange services all down

We have two exchange servers-2016, all services of Exchange are down, cluster down, it happened all of a sudden , urgent help is requird 
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Paul MacDonald
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Are these physical or virtual machines?

What significant events are in the event logs?

What happens when you try to restart the cluster service?  What happens when you try to restart the Exchange services?

Is there a SAN or NAS backend?  Is it up and running properly?
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Shahid Rafiq

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-VM
-Cluster tries to start but fails
- All services start for a while but turns down again
-SAN based

-We have two Exchage Servers which are running on DAG,
-our Cluster is completely down
-Services not restarting
Hi,
You can try to force the cluster service to start without quorum :

Force a WSFC Cluster to Start Without a Quorum - SQL Server Always On | Microsoft Docs 

Exchange services can only stay starting on a dag member, if the cluster service is active.

Now, events log should be the best source of information when all network parameters have been verified (DNS, AD Resolution and access).
Is the SAN working?  Can you access whatever is stored there?

Is there a witness for the cluster and is it working?
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Shahid Rafiq

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