Lync 2010 Client Incorrect DisplayName

A few weeks ago we started having an issue where a users display name in the lync 2010 client would display a username other than the what we expected to see.  We started to notice this issue after a women would change her last name.  So, a a Women who was married and her name was changed other user would still see her old name. It turns out that we needed to make the following change:   EnableContactMergeUsingProxyAddress -Value $False. 

The forum post below is where I got the information to make the modifications  After a service restart the usernames displayed correctly. 

Cod Snipit from Forum Post.
 
$PolicyObject = Get-CsClientPolicy
$PolicyEntry = New-CsClientPolicyEntry -Name EnableContactMergeUsingProxyAddress -Value $False
$PolicyObject.PolicyEntry.Add($PolicyEntry)
Set-CsClientPolicy -Instance $PolicyObject
Get-CsClientPolicy

Thanks to TechNet Forums.

Lync 2010 Client Incorrect DisplayName.

Grand a user permission to send to Everyone

Grant a user permission to send to the everyone group. 

1. Open properties of everyone Group in EMC.
2. Open MailFlow Settings.
3. Open MessageDeliveryRestrictions
4. Add user

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