HTTP Error 404 requested resource not found when accessing site through VIP

We have 2 Team Foundation Server 2018 Web/App Servers: UTMVTI0190 is the Primary App Server (active - up and running) UTMVTI0191 is the secondary server (inactive) no software installed

We installed Team Foundation Server 2018 as http in our primary test server. Everything is running fine when via the default url -

We then had our F5 load balancer group create a secure VIP for it (to offload SSL), https://172.20.155.228/ and assigned the VIP to a url tfs.testqa.zionsbank.com which is bound to the application server (utmvti0190) on port 80 - and on the second “inactive” server utmvti191.

The flow is: WAN users—port 443—> TFS TEST VIP tied to url https://tfs.testqa.zionsbank.com—port 80—> TFS TEST APP SERVER (utmvti0190) Firewall ports are open between the WAN and the TFS TEST VIP on port 443 and from the VIP to the TEST APP SERVERS on port 80.

telnet tests work fine as does nslookups.

However, when trying to connect via the new url https://tfs.testqa.zionsbank.com We get,

Not Found HTTP Error 404. The requested resource is not found.

F5 Engineer is “seeing” traffic from the internal WAN to the TFS Test VIP and the Networking team is seeing traffic from the TFS Test VIP to the app server “UTMVTI0190”

F5 Engineer set everything is setup fine on his end.

Could the problem be related to mapping the VIP to multiple host names without setting up some sort of context roots?

https://172.20.155.228/tfs1 —> UTMVTI0190 https://172.20.155.228/tfs2 —> UTMVTI0191 ?

Steps Taken: restarted the VM server stopped/started TFS additional configuration needed in the IIS? (which is used by default in TFS installations)

Thank you, welcome to any suggestions. I’ve set up the F5 on windows servers with JIRA and Confluence installed and it runs just fine.