Windows Admin Center single sign on configuration

Question

Hello everyone, I have installed WAC latest version on a Windows Server 2019.

I've tried to enable SSO to servers, and it seems set up correctly. However, when I login as domain admin on WAC and try to connect to a server to manage it, I am still offered the insertion of other credentials, displaying a warning about kerberos delegation.

This is what i've done :

foreach($Server in $ServerList){
Set-ADComputer -Identity (Get-ADComputer $Server.Name) -PrincipalsAllowedToDelegateToAccount (Get-ADComputer $WAC)
}

Now, if i look into my WAC server filtering msDS-AllowedToActOnBehalfOfOtherIdentity i get:

TruestedForDelegation : True

I did also clear the KDC cache on the server i am trying to manage.

Perhaps I am missing some fundamental details

Would any of you be kind enough to give me some suggestions?

Thank you