SharePoint 2010 User Profile Synchronization connection missing

Issue Description

Last week, while I was checking the User Profile Settings in my Sharepoint 2010 farm and I noticed that on browsing to

User Profile Service Application -> Synchronization -> Configure Synchronization Connections 

-> My Synchronization Connection was empty.

I swear I have that it was always there, but below is the error message I saw

The query returns nothing.

Resolution

1. Go to Run -> services.msc

2. I checked for the service Forefront Identity Manager Services. It was not in Started state

3. Right click and Start it.

This should fix the issue.The Synchronization Connection should show up now

User Name is displaying incorrectly in SharePoint

Issue Description

A user's display name is incorrect on a SharePoint site .A user in your organization has recently updated some of his or her information (such as the user's display name) in Active Directory Domain Services. The information was updated correctly in the user Profile Service Application. However, on a specific Microsoft SharePoint 2010 Site Collection, that information was not updated.

Cause

The user is not synchronizing correctly to a Site Collection. This most likely occurs because the user is not flagged as Active on the Site. In Microsoft Office SharePoint 2007, you could remove the user from the All People group and re-add them. This option is no longer available in SharePoint 2010.

Resolution

In simple words – Note the permission of the user in the site. Remove the user from the site and add again. Detailed explanation is below

Important: If you remove the user from the All People group, all the user's permissions to this Site Collection are removed. Before you remove the user's permissions and re-add them, note the user's permissions. To do this, on the Site Actions menu, click Site Permissions, and then click Check Permissions.

The All People group is hidden in SharePoint 2010. However, to access this group, you can modify the following 

URL in the browser:

<Site URL>/_layouts/people.aspx?MembershipGroupId=0

For example, the URL will resemble the following:

https://contoso.com/sites/<SpecificSiteName>/_layouts/people.aspx?MembershipGroupId=0

If you remove the user from this group, this also removes the user from the userInfo table in the Microsoft SQL Server database. When you re-add the user, the user's information is updated in this table.

Reference

Configuring Replicating Directory Changes

While provisioning the User Profile Service (UPS), we can synchronize user profile information using the User Profile Synchronization Service. Synchronization between AD and SharePoint should be done using a domain account, called the synchronization account, i.e. DOMAIN\SPFarmAccount. This synchronization account requires Replicate Directory Change permissions in the domain.

Below are the steps on how you do this.

1. Open Active Directory Users and Groups with local machine Administrator permissions.

2. Right click the domain and select Delegate Control.

3. Click Next on the Delegation Control Wizard welcome page.

4. On the Users or Groups page, add the domain\account of your SharePoint farm admin account and click Next.

5. On the Tasks to delegate page, select “Create a custom task to delegate” and click Next.

6. On the Active Directory Object Type page, keep the default options and click Next.

7. On the Permissions page, check the “Replicating Directory Changes” and click Next

8. Click Finish to complete the Delegation of Control Wizard.