- Restart "Network Location Awareness" service
- Restart "IP Helper" service
- "netsh dnsclient show state" (inside/outside office)
- "netsh interface httpstunnel show interfaces" (connected/not connected)
But this time nothing seems to help. The error message (this time) were: Interface Status: IPHTTPS interface deactivated.
It mentions: You should try using netsh to disable Teredo.
For example, if you execute the following command: "netsh interface teredo set state disable". You will in fact disable Teredo. Provided that your IP-HTTPS solution is working, the Direct Access client will then switch over to IP-HTTPS. You can verify this using the following command: "netsh interface httpstunnel show interfaces". Now, to re-enable Teredo you would use the following command: "netsh interface teredo set state default".
After that everything went fine again. Strange thing however we don't use Teredo at all, but still this can be the solution! ;)