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Source facts

\n

Microsoft labels the Windows Admin Center VM Conversion extension as a preview product. Its troubleshooting guide identifies a synchronization failure in which the extension cannot retrieve or validate the Change ID for one or more disks on the source VMware VM. One documented recovery path regenerates Changed Block Tracking and includes powering the source VM off and back on before retrying synchronization. Microsoft documentation.

\n

Applicability

\n

Use this review only for the documented preview extension and matching synchronization symptom. Identify the extension version, source VM, affected disks, and exact error. Review current preview limitations before planning further migration work.

\n

DSE recommendation

\n

Preserve the failed operation details and the disk identifiers before attempting recovery. Have the VMware owner examine the Changed Block Tracking state and confirm whether the documented path applies. Treat its power transition as an interruption requiring workload approval. Record the intended recovery sequence and the approved retry point rather than repeatedly restarting synchronization without evidence.

\n

Verification

\n

After an authorized corrective action, record the source VM and disk state and retry the selected synchronization. Compare the result with the original Change ID failure. Verify application readiness after any power transition through the agreed guest checks. Escalate a continuing failure with the retained extension, VM, and disk details before proceeding with conversion.

\n

Official references

\n

Microsoft Learn: Troubleshoot the VM Conversion Extension in Windows Admin Center (Preview). Source reviewed September 8, 2026.

", "content_text": "Source facts\nMicrosoft labels the Windows Admin Center VM Conversion extension as a preview product. Its troubleshooting guide identifies a synchronization failure in which the extension cannot retrieve or validate the Change ID for one or more disks on the source VMware VM. One documented recovery path regenerates Changed Block Tracking and includes powering the source VM off and back on before retrying synchronization. Microsoft documentation.\nApplicability\nUse this review only for the documented preview extension and matching synchronization symptom. Identify the extension version, source VM, affected disks, and exact error. Review current preview limitations before planning further migration work.\nDSE recommendation\nPreserve the failed operation details and the disk identifiers before attempting recovery. Have the VMware owner examine the Changed Block Tracking state and confirm whether the documented path applies. Treat its power transition as an interruption requiring workload approval. Record the intended recovery sequence and the approved retry point rather than repeatedly restarting synchronization without evidence.\nVerification\nAfter an authorized corrective action, record the source VM and disk state and retry the selected synchronization. Compare the result with the original Change ID failure. Verify application readiness after any power transition through the agreed guest checks. Escalate a continuing failure with the retained extension, VM, and disk details before proceeding with conversion.\nOfficial references\nMicrosoft Learn: Troubleshoot the VM Conversion Extension in Windows Admin Center (Preview). Source reviewed September 8, 2026.", "content_markdown": "## Source facts\n\nMicrosoft labels the Windows Admin Center VM Conversion extension as a preview product. Its troubleshooting guide identifies a synchronization failure in which the extension cannot retrieve or validate the Change ID for one or more disks on the source VMware VM. One documented recovery path regenerates Changed Block Tracking and includes powering the source VM off and back on before retrying synchronization. [Microsoft documentation](https://learn.microsoft.com/en-us/windows-server/manage/windows-admin-center/use/troubleshoot-vm-conversion-extension).\n\n## Applicability\n\nUse this review only for the documented preview extension and matching synchronization symptom. Identify the extension version, source VM, affected disks, and exact error. Review current preview limitations before planning further migration work.\n\n## DSE recommendation\n\nPreserve the failed operation details and the disk identifiers before attempting recovery. Have the VMware owner examine the Changed Block Tracking state and confirm whether the documented path applies. Treat its power transition as an interruption requiring workload approval. Record the intended recovery sequence and the approved retry point rather than repeatedly restarting synchronization without evidence.\n\n## Verification\n\nAfter an authorized corrective action, record the source VM and disk state and retry the selected synchronization. Compare the result with the original Change ID failure. Verify application readiness after any power transition through the agreed guest checks. Escalate a continuing failure with the retained extension, VM, and disk details before proceeding with conversion.\n\n## Official references\n\n[Microsoft Learn: Troubleshoot the VM Conversion Extension in Windows Admin Center (Preview)](https://learn.microsoft.com/en-us/windows-server/manage/windows-admin-center/use/troubleshoot-vm-conversion-extension). 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Its troubleshooting guide identifies a synchronization failure in which the extension cannot retrieve or validate the Change ID for one or more disks on the source VMware VM. One documented recovery path regenerates Changed Block Tracking and includes powering the source VM off and back on before retrying synchronization. Microsoft documentation.\nApplicability\nUse this review only for the documented preview extension and matching synchronization symptom. Identify the extension version, source VM, affected disks, and exact error. Review current preview limitations before planning further migration work.\nDSE recommendation\nPreserve the failed operation details and the disk identifiers before attempting recovery. Have the VMware owner examine the Changed Block Tracking state and confirm whether the documented path applies. Treat its power transition as an interruption requiring workload approval. Record the intended recovery sequence and the approved retry point rather than repeatedly restarting synchronization without evidence.\nVerification\nAfter an authorized corrective action, record the source VM and disk state and retry the selected synchronization. Compare the result with the original Change ID failure. Verify application readiness after any power transition through the agreed guest checks. Escalate a continuing failure with the retained extension, VM, and disk details before proceeding with conversion.\nOfficial references\nMicrosoft Learn: Troubleshoot the VM Conversion Extension in Windows Admin Center (Preview). 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