issue deleting VPC due to mysterious in use NetworkInterfaceId

Question

Hi there --  
  
We're having an issue deleting a VPC because of a stuck NetworkInterface. As far as we know we've deleted all resources which might be using this NIC but unable to cross the finish line, w/ reports on all resources of dependencies and the NIC reporting being in use.  
  
Have used the script provided here: https://aws.amazon.com/premiumsupport/knowledge-center/troubleshoot-dependency-error-delete-vpc/ to get the below list of resources.  
  
Can someone on AWS side help us resolve please?  
  
For our reference, if this is NOT a bug, please share additional insight as to what was still associated and needed order of deletion to remove these resources for next time around.  
  
Resources associated w/ vpc-058d710931d7f2007:  
            "SubnetId": "subnet-0f5835bb0e388c521",  
                    "RouteTableId": "rtb-003e0f4664b0c370e",  
            "RouteTableId": "rtb-003e0f4664b0c370e",  
                    "NetworkAclId": "acl-0b75d387a657049c8",  
            "NetworkAclId": "acl-0b75d387a657049c8",  
                            "GroupId": "sg-0d44b994e3bf4b133",  
            "GroupId": "sg-0d44b994e3bf4b133",  
            "NetworkInterfaceId": "eni-0e041f7df5d0fb4b7",  
  
Thanks for your help!  
  
Edited by: damian-tw on Apr 11, 2021 10:42 AM

Answer

It looks like we had a user enable Amazon QuickSite which associated to a network interface and VPC.  
  
Helpful for this VPC's destruction was looking at the Description field for the specific network interface.  Many services will automatically label this field to give you some insight as to what you need to look at for any outstanding resources. I just had never heard of QuickSite before -- so many new services ;)  
  
In my case, I went to QuickSite and removed relevant users with associated resources and this finally allowed us to remove this VPC.

issue deleting VPC due to mysterious in use NetworkInterfaceId

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