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"Value cannot be null. Parameter name: dnsName” Error when performing Infrastructure scans in Veeam Backup for AWS

KB ID: 3147
Product: Veeam Plug-In for AWS
Version: Any
Published: 2020-04-16
Last Modified: 2024-07-23
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For more information about Veeam Plug-In for AWS considerations and limitations, please review:

Veeam Backup for AWS User Guide > Planning and Preparation > Considerations and Limitations

Challenge

When performing an infrastructure scan in Veeam Backup for AWS, you receive the following error: 
“Failed to synchronize region 'regionname': Value cannot be null. Parameter name: dnsName”
"Value cannot be null. Parameter name: dnsName”

Cause

Your AWS account supports only EC2-Classic instances. In Veeam Backup for AWS, you can protect only EC2 instances that run in a VPC.

Solution

Please migrate from EC2-Classic to a VPC.

If this KB article did not resolve your issue or you need further assistance with Veeam software, please create a Veeam Support Case.

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