Teredo is unable to qualify - client is in a managed network

Well for any other people looking for a solution, this is it:

https://www.reddit.com/r/Windows10/comments/m1xgzt/teredo_is_unable_to_qualify_client_is_in_a/

Let me just add for any developers: Teredo is stupid and riddled with issues.

I'm Samy an independent advisor. Welcome to the community. How are you?

Your problem was solved with these instructions that are in the link you mentioned, mate?

Just to clarify these are my Teredo paramaters:

Type : enterpriseclient

Server Name : win1910.ipv6.microsoft.com.

Client Refresh Interval : 20 seconds

Client Port : 3544

State : qualified

Client Type : teredo host-specific relay

Network : managed

NAT : cone

NAT Special Behaviour : UPNP: Yes, PortPreserving: Yes

My nat type changed to restricted port but nothing on my router is blocked my parameters got updated Teredo Parameters
---------------------------------------------
Type : enterpriseclient (Group Policy)
Server Name : xxxxxxxxxxxxxxxxxxx (Group Policy)
Client Refresh Interval : 30 seconds (Group Policy)
Client Port : unspecified (Group Policy)
State : qualified
Client Type : teredo client
Network : managed
NAT : restricted (port)
NAT Special Behaviour : UPNP: Yes, PortPreserving: Yes
Local Mapping : xxxxxxxxxxxxxxxxxxxxxxx
External NAT Mapping : xxxxxxxxxxxxxxxxx

Thanks for taking the time to share this. Your NAT shows "Teredo is unable to qualify". Lets try to solve this as this may be causing your issues.

Check your connection again and click on "Click here for more information". You will be redirected to a Xbox page showing you tips to solve the Teredo issue.

If you are running Windows 10 Pro, Business or Enterprise, also try the steps below after the ones from the Xbox website:

- Press Windows + R > Type gpedit.msc and press Enter.

- Under Computer Configuration > Administrative Templates > Network > TCP/IP Settings > IPv6 Transition Technologies.

- Find "Set Teredo Client Port" , "Set Teredo Default Qualified" , "Set Teredo Refresh Rate", "Set Teredo Server Name", "Set Teredo State". Change these settings like below:

Set Teredo Client Port - Enable - input " 0"

Set Teredo Default Qualified - Enable - choose "Enabled State"

Set Teredo Refresh State - Enable - Choose "30" or "20"

Set Teredo State - Enable - choose "Client" (If after doing all steps it fails, try choose Enterprise Client instead.)

Let me know how it goes, please.