Logout Backoffice users with Open Id Connect

Hi , i’m using Duende IdentityServer as Umbraco V10.2.0 's External login ( auto-linking - security - reference - Documentation - our.umbraco.com ).

And i am trying to implement single-sign-out. May be sign out Umbraco backoffice users will log-out Identity Server or the opposite way is fine.
Is there any setting in OpenIdConnect that help me with this or i have to overide some kind of LogoutManager class in Umbraco to do this.

I tried some setting :
Client ( umbraco backoffice ) :

options.SignedOutCallbackPath = "signout-oidc"

and IS: PostLogoutRedirectUris = { "https://localhost:44309/signout-oidc" }

https://stackoverflow.com/questions/49117283/identityserver4-postlogoutredirecturi

Any help is appreciated.
Thank you.


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/110146-logout-backoffice-users-with-open-id-connect