In 2022 we created a SharePoint site "Portal" for internal & external users. Sometimes external users would have issues signing in. However, now external users are able to sign in, but are getting kicked out. It's like SharePoint logs them out after about 2-3 seconds. They are guest users in the tenant added through the SharePoint site and not invited as a guest user in Azure.
Please any help, suggestions, articles, etc. would be greatly appreciated. Thank You