Hello @Umang Mehta Thank you for reaching out to us on Microsoft Q&A platform. Happy to help!
I see that while using Linux (non-domain) credentials type, you are getting credentials issue.
Are you using the latest version of the Azure Migrate appliance?
Refer to - https://learn.microsoft.com/en-us/azure/migrate/migrate-appliance#check-the-appliance-services-version
There can be multiple issues here that we are not aware…
In Portal - in assessment tool- OS distribution - What is unknown means.
Azure Migrate is unable to identify the specific Linux distribution running on the VM, is it supported?
Please check the link - https://learn.microsoft.com/en-us/troubleshoot/azure/cloud-services/support-linux-open-source-technology
Second, In Portal - In discovered servers, Agentless - I see validation failed. How to resolve that.
If you click on the validation failed it should show the reason, if it's dependency analysis confirm the permissions:
Required permissions:
https://learn.microsoft.com/en-us/azure/migrate/add-server-credentials#required-permissionshttps://learn.microsoft.com/en-us/troubleshoot/azure/cloud-services/support-linux-open-source-technology
Hope this helps!