AD User profile properties not updating in SharePoint

One of our client reported an issue with SharePoint Alerts. They configured a SharePoint Alert for a list in a SharePoint 2010 site and realized that the alert not being sent to a particular user.

I checked in SharePoint server ,  the User Profile Synchronization Service was running without any issue. 

But when they updated the user details ( email address ) in Active Directory, the updates were not being shown in SharePoint and the user's Email Address was not changing. 

Issue:

It was because, despite the user’s email address was updated in the SharePoint user profile, but sometimes in SharePoint the changes do not propagate to the web application.

So I used the below trick to fix it:

Solution:

1.      Navigate to the hidden user list https://Site URL/_catalogs/users/simple.aspx
2.      Delete the user
3.      Again add this user to site Members group ( or what ever group .
4.      Set Alert for user on  https://Site URL/Lists/List Name/AllItems.aspx

 The alert works fine.

  

 Hope the is helpful.   

 Kate