Hi Ankit Vats ADM INT (Others) ,
Welcome to Microsoft Q&A platform and thanks for posting your question here.
As I understand your issue, you are facing an error : "InvalidVnetConfiguration" when you are trying to create an Azure SSIS Integration Runtime in ADF. Please let me know if that is not the correct understanding about your issue.
The error message you're encountering, "InvalidVnetConfiguration" with the message "VNet configuration is invalid" and "MisconfiguredDnsServerOrNsgSettings", indicates that there is an issue with the virtual network (VNet) configuration you've set up for the Azure-SSIS integration runtime. The specific issue could be related to the domain name system (DNS) server, network security group (NSG), or user-defined route (UDR) settings in your VNet.
When there's a Virtual Network-related issue, you are prone to experience this error as mentioned in the following document: MisconfiguredDnsServerOrNsgSettings
In this situation, you probably have a customized configuration of DNS server or NSG settings, which prevents the Azure server name required by SSIS IR from being resolved or accessed. For more information, see SSIS IR Virtual Network configuration.
If you’re still having problems, I would recommend you to Create Support request with Azure.
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