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bobtimmons1's avatar
bobtimmons1
Copper Contributor
Jan 09, 2026

Windows Admin Center - Vmware migration to HyperV

We have a vCenter (multiple hosts) with about 30 VMs and need to migrate them to a single HyperV host. I installed the Windows Admin Center and the other components (https://learn.microsoft.com/en-us/windows-server/manage/windows-admin-center/use/migrate-vmware-to-hyper-v). I migrated 2 servers, one at a time, and both seemed to work, though I had to set the IP manually. I then chose 2 servers to migrate both at the same time and it seems to be hung. The sync process completed successfully. The migration process for both got to 25% and has been stuck there for a day now. The disks aren't that big and, presumably most of that was created/copied during the sync process. 

I also don't see an option to stop the process or restart it. I know the VM Conversion is a Preview function, so I'm sure support it limited. Any help or direction would be appreciated.

4 Replies

  • jameshopkins's avatar
    jameshopkins
    Copper Contributor
    Mar 02, 2026

    Hi bobtimmons1​ Bryan_Nikkel​ 

    We have a similar issue when using this tool. We have migrated around 10 VMs successfully. But on a recent one with over 2TB disks, we are getting the stuck at 25% issue. We have tried it multiple times and same issue after leaving it for a day. Tried clearing the syncstatus and migrationstatus files and restarting WAC gateway service and server. We are also on the latest version of the extension.

  • jameshopkins's avatar
    jameshopkins
    Copper Contributor
    Mar 02, 2026

    Hi bobtimmons1​ Bryan_Nikkel​, did you guys manage to resolve this? We have been using this tool to migrate around 10 VMs and worked very well, with Windows and Linux, until we got to a Windows server with disks adding up to over 2TB. Sync works fine and then when we go to migrate it passes checks and gets stuck on 25%, left for over a day and no progress. It goes to 25% pretty quick as usual, but then no sign of any activity in logs. I can see snapshot being taken in Vmware which takes a few seconds. We have tried it multiple times and the same issue. Also cleared the syncstatus.json and migrationstatus.json files and restarted the WAC gateway. I can see with the latest version it is supposed to improve issues with migrations getting stuck and 25%, but we have been on the latest version since 18th Feb and issue still happens. We can continue to migrate other smaller servers still with no issues.

    Priya_Satheesh​ Any ideas?

    Thanks in advance

  • Priya_Satheesh's avatar
    Priya_Satheesh
    Icon for Microsoft rankMicrosoft
    Jan 22, 2026

    Hi, there is a known issue with the bulk migration process. Are you able to migrate those 2 VMs that failed earlier migrate one at a time?

    • Bryan_Nikkel's avatar
      Bryan_Nikkel
      Copper Contributor
      Jan 28, 2026

      I've run into the same thing.  I was only doing one VM at a time.  Sync'd yesterday.  Attempted to Migrate today.  I see on the vSphere side it showed taking a snapshot but on the Admin Center side stuck at 25%.  I did several test VM's and one production VM prior to this and they worked.  I did not use the optional tools to remove VMware Tools or handle Static IP's since in testing I found those both made the migration stall at 25% as well.  My session between Admin Center and Vcenter may have timed out during the process.  Is there any way to start it over?