The people picker gets/picks information from multiple locations:
– The User Information List
– Active Directory
The User Profile Service Application syncs information from the AD and updates the User Information List.This Sync
does not delete the user from the list.
User Information List is hidden List.
It can be viewed via the browser by navigating to below urls
1.<Site URL>/_catalogs/users/simple.aspx
2. <Site URL>/_catalogs/users/detail.aspx
3.To delete the same open the below URL's
<Site URL>/_layouts/people.aspx?MembershipGroupId=0
or
<Site URL>/_layouts/15/people.aspx?MembershipGroupId=0
and click on “Actions –> Delete Users from Site Collection
4.To view Specific User
<Site URL>_layouts/userdisp.aspx?Force=True&ID=idofUserInUserInfoList
5.Orphande users will cause problem
