2503 is caused by a code defect in Storage Migration Service when you provide migration credentials in the form of a User Principal Name (UPN), such as 'email@example.com'. The Storage Migration Service orchestrator service fails to parse this format correctly, which leads to a failure in a domain lookup that was added for cluster migration support in KB4512534 and 19H1.
To work around this issue, provide credentials in the domain\user format, such as 'Microsoft\danny'.
2509 is caused by a code defect in the Storage Migration Service. The only workaround currently is to rename the computer to have the same name as the NetBIOS name, then use NETDOM COMPUTERNAME /ADD to add an alternate computer name that contains the longer name that was in use prior to starting Inventory. Storage Migration Service supports migrating alternate computer names.
Thanks for your time.
If the Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.