Hello @jtallon; Most of the openid providers doesn't allow 3rd party signout. This means, if you integrated google login to your application, when login with google account and logout; you won't be able to logged out of google account but your application only. That is something up to openid providers.
For AzureAD you should be able to logout from AzureAD. After you signout from your cookie and openid schemes, you need to make a request to
Here is a sample that can help you out https://github.com/Azure-Samples/active-directory-dotnet-web-single-sign-out.
I hope it was helpful.