Any ER Case assigned to me should show in SharePoint(ER Case Folder) when I log in with Standard Account. Only cases assigned to me should show and no other folders to be displayed in the ER Cases folder.
The new ER Case will be created by the user from Dynamics 365, for example, if a user called John created a case and attach a document in Dynamics365 it will come and save in ER Cases folder by creating a new folder in SharePoint. When John log-in into SharePoint he should only view his created cases folders instead of others.