how to troubleshoot hyper-v replication issues...

I'm running four hyper-v servers hosting about 20 virtual servers and I'm using replication.

Currently, my exchange server is in a critical replication state and the report is that it has not replicated since December 6, 2017!!!

When I right click and resume replication, I get a message that a resent is needed, but when I try that, the merge starts and then goes back to error state.  I DO see a message that reads Last successful replication for virtual machine Exchange has been delayed.  Delay has exceeded the defined critical limit.  Replication might be encountering problems.

What I have done in the past is remove replication and then re-enable it.  I'm tired of that lazy approach but I'm not sure how to go about troubleshooting replication issues in Hyper-V.

Can someone give me a few basic steps to troubleshoot this?

Thanks

Cliff
crp0499CEOAsked:
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Unfortunately, Exchange is not supported with Hyper-V Replica.
https://blogs.technet.microsoft.com/rmilne/2013/07/29/exchange-and-hyper-v-replica-support/
So your problem MAY be related to this lack of support/the reason it's not supported.  

Instead of Replica, you should setup another Exchange Server and DAG support.

That said, I have replica working on an SBS 2011 server with Exchange 2010.  But there could be configuration differences that allow mine to work while yours doesn't.  Or there could be an entirely different reason yours doesn't.
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crp0499CEOAuthor Commented:
WOW...that's interesting to know.  It's been running like this for three years and we have even failed over to it before.  It's just this random break and my fix has always been to just remove replication and start it over.  I did that last night and it's normal now.  I'll read the link and see what's up.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Check the Hyper-V and Hyper-V Replication specific event logs to see what the error is. There should be some sort of indication in there.
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