Account is removed in AD but User Profile still exist

Question

We are using SP 2013 On-Premises and User Profile Service (UPS) is setup to sync with our AD for more than a year. Most of the users created/deleted on AD will be added/deleted in the SharePoint UPS as expected.

However, we found some users:

1. Not existing in AD anymore (deleted) for half year but his profile still exist. We can search out this user in search center.
2. Some new users added in AD for half year but his profile is not created in SharePoint UPS.

The problem is the situation is not occurring to all but only SOME of AD accounts.

May I have your advice what could be the possible reason? So that I can make some test to verify it.

Answer 1

You can perform the following to resolve the issues:

1. Make sure User Profile Synchronization service is running
2. In the user profile service application make sure "Profile Synchronization Status" is not stuck in synchronizing state.
3. Start a full User Profile Synchronization
4. Re-add forest and make sure the password of the account used for synchronization isn't expired

Answer 2

based on your statement, it looks like the user profile sync is not happening properly.

follow the below troubleshooting steps:

1. Try doing a sync manually meaning re-importing. that should clear the problems.

2. Inspect the log entries

3. Make sure timer services and user profile sync services are running properly.

4. Also, additionally make sure the account used for connecting to AD is still having proper access at both SharePoint and AD.