Azure migrate error -ErrorCode: '499' VM: 'hostname'. Appliance: 'XX-Migrate'. Error: An internal error occurred. [The object properties are not set.]

@Mahendra Sahu Thank you for contacting us!

It seems you are getting an internal error '499' during delta replication using Azure Migrate. Please try follow suggestions, see if this helps:

Review the logs for more detailed error messages. Logs are typically located in C:\ProgramData\Azure\AzureMigrate\Logs on the appliance. Look for logs around the time the error occurred to identify any additional details.

Ensure that the VMs encountering issues have the same configuration as the ones that are working. Check for any differences in network settings, hardware configurations, or VM settings that might affect the migration.

Ensure that the Azure Migrate appliance is up-to-date with the latest version. Sometimes, errors are resolved in newer updates or patches.

Ensure that there is no network issue between the Azure Migrate appliance and the VMs. Verify that there are no firewall rules or network security groups blocking necessary communication.

If these steps doesn't help resolving your issue, you may want to reach out to Azure technical support team by raising a support request. The ticket enables you to work closely with the support engineers and get a quick resolution to your issue.

Here is the link - https://docs.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request to create support case.

Hope this helps!