I've got an issue in my SharePoint 2013 Enterprise environment where a few users are showing blank phone numbers despite having a number listed in their SharePoint profile.
For example, if we look at John Doe in the Users List, he has no phone number listed. If we look at his actual profile in Central Administration, or on his My Site, the phone number is there. We are using SharePoint Profile Synchronization to get the information from AD, and I've tried forcing both a full and an incremental sync with no change. This issue isn't consistent, however, as most users have their phone numbers listed.
How can we get the Users List for the site collection to consistently sync up with the user's SharePoint profile on the farm?