I'm running a 2010 SharePoint environment and have encountered a problem in the User Information list.
Previously a user logged in with username:
But his accountname has been changed to username:
The problem I'm facing now is that his Account name is not being updated in SharePoint. When he clicks My Settings and lands on the User Information page, it still shows his old login name.
I can view his - incorrect - User information on the page:
Does anyone know how I can force an update of his account name?