Hi @Doug Knudsen Apologies for the inconvenience caused due to this issue.
As per the Troubleshooting guide shared in the answer above, for the below error that you are seeing for new VMs,
Error: "Management operations on VM are disallowed because migration is in progress"
Mitigation is : This error occurs because the VM is in Prepare state and therefore locked for any update/delete operation. Call Abort using PS/CLI on the VM to roll back the migration and unlock the VM for update/delete operations. Calling commit will also unlock the VM but will commit the migration to ARM.
If you are still stuck, I would recommend to utilize the following support path for your migration issue :
Azure Migration Support: Dedicated support team for technical assistance during migration. Customers without technical support can use free support capability provided specifically for this migration.
If you are having difficulties in creating a free support request, let me know in the comments and I can enable a free support request for you.
If you have any questions at all, let me know in the comments.
If it helps, please 'Accept as Answer' so that it can improve discoverability for others in the community looking for help on the same topic.