“All People” is really helpful if you want to see who are all the people have access to site and if you want to delete the user from site completely in SharePoint 2007, as shown below.
But in SharePoint 2010 All People Link is missing!!! Don’t panic. We can get it back by a simple trick.
So What is the trick?
The trick is: Navigate to “https://Your-SharePoint-site/_layouts/people.aspx?MembershipGroupId=0”