Tag not monitored by Microsoft.
Something here may help.
https://learn.microsoft.com/en-us/azure/devops/organizations/security/allow-list-ip-url?view=azure-devops&tabs=IP-V4
Devops / TFS is not currently supported here on Q&A. The product group for Azure DevOps / TFS actively monitors questions over at
https://developercommunity.visualstudio.com/report?space=21&entry=problem
https://developercommunity.visualstudio.com/report?space=22&entry=problem
--please don't forget to upvote and Accept as answer if the reply is helpful--