We are having a difficult time trying to find the Administrator of a SharePoint site in a very large organization and in the mean time I am trying to get an answer.
A SharePoint site used to be configured to where users that were logged into a pc with their network credentials and that were given permissions to the site had their credentials pass-through while users that were logged on to a pc that did not have permissions to the site were prompted for credentials.
That recently changed and now users that don't have permissions get the message:
Sorry, this site hasn't been shared with you.
Does anyone have any idea what could have changed?