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Hyper-v 2016 automatic merge failed after backup(Veeam or other)

Hello!

Have a big problem after migration from VMware to hyper-v hosts. After end of backup, avhdx files don’t automatic merge to parent partition. Im in panic. Anyone have this problem? 3 hosts - same problems. Different guests… 2008, 2008r2, 2012r2. It helps
to manualy merge Childs, or shutdown and start VM, but it is not a good idea in big production and 24/7 services. Help me please. Do anyone have any solutions, idea or something else?

Is it known issue in Microsoft? Epic fail. Really.

In event logs I see event 19100. Ok. I know, that is problems with permissions… but it is no difference between new VM, migrated, moved… all is fine with acl. nt virtual machines<> everywhere.

Please, help and thank you!

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