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

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

KB ID:	3147
Product:	Veeam Backup for AWS
Version:	Any
Published:	2020-04-16
Last Modified:	2020-08-13

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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.

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