Lync duplicate contacts sync from outlook


  • In my outlook 2010 under contacts --> Lync contacts showing duplicate contacts of each.
    What is the purpose of Lync contacts in outlook. where does it sync with.

    How to remove duplicate entries.

    I am using Lycn 2013 client & Lync server 2010.

    Monday, December 24, 2012 6:56 AM


All replies

  • Hi,

    Please try this:

    In the upper right corner of the Lync main window, click Options (gear icon).

    In the Lync - Options dialog box, click Personal.

    Clear the Save my Lync contacts in my personal contacts folder on the Exchange server check box.

    For details:

    Kent Huang
    TechNet Community Support

    • Proposed as answer by Kent-Huang Thursday, January 3, 2013 6:53 AM
    • Marked as answer by Kent-Huang Thursday, January 3, 2013 6:53 AM
    Tuesday, December 25, 2012 2:10 AM
  • i do not see that option in Lync 2013 client.
    Tuesday, December 25, 2012 4:38 AM
  • Hi,

    Please refer to this picture:

    Kent Huang
    TechNet Community Support

    • Edited by Kent-Huang Thursday, January 3, 2013 6:53 AM
    Thursday, January 3, 2013 6:51 AM
  • Having the same problem... tons of duplicates... no option in 2013 to deselect.

    Any other solution?


    • Proposed as answer by RickBal Thursday, August 6, 2015 8:31 PM
    Thursday, January 3, 2013 4:47 PM
  • Lync Server 2010 back-end should be CU5 or greater, then:

    • Set-CsClientPolicy global -EnableExchangeContactSync $False
    • Delete Lync Contact folder from the Personal contacts in Outlook. The folder will be recreated but no contacts.
    Tuesday, January 15, 2013 3:45 PM
  • Having the same problem... tons of duplicates... no option in 2013 to deselect.

    Any other solution?


    I have the same issue: my screen looks like the one above so I do not have the option to 'deselect'.

    Is there another way to solve this?

    PD.- I'm also using Outlook 2013, Lync 2013 client, Lync Server 2010

    Saturday, February 2, 2013 12:16 AM
  • i have the same issue; outlook 2013, lync 2013 client; hosted lync server 2010

    Nate Richards custom software @

    Friday, June 7, 2013 10:33 PM
  • Hi Michael

    I'm having the same frustrating issue with Lync contacts and have tried your suggests here but the Lync contacts folder cannot be deleted in Outlook 2013. Do you perhaps know how to go about deleting it?

    My setup is as follows: Outlook 2013, Lync 2013 Client, Lync Server 2010

    Many thanks in advance.


    Tuesday, July 30, 2013 1:26 PM
  • Is your Lync Server 2010 CU5 or higher? Did you run the powershell command: Set-CsClientPolicy global -EnableExchangeContactSync $False

    Sign out of Lync and back in.

    Delete the Lync contact folder in Outlook, if still having issues try to do this while the Lync client is not running.

    Tuesday, July 30, 2013 1:52 PM
  • Yes all Lync updates have been applied (using Windows Updates) and have successfully run the ps cmdlet however Outlook 2013 still does not allow me to delete the 'Lync Contacts' folder. I have also tried closing Lync & Outlook and given around 60 mins for any syncing.

    I'll try the Lync 2010 Cumulative Server Update Installer tonight and report back, thanks for your help.


    Tuesday, July 30, 2013 2:25 PM
  • Don't forget to apply the Lync updates to the back end SQL databases. Also try to delete the folder from OWA.
    Tuesday, July 30, 2013 2:33 PM
  • Hi, if you want to remove Lync Contacts whether duplicate entries, you can delete from OWA application, it just manually delete one-by-one Contact list or using Shift then sort.

    In Outlook 2013 their can not delete because Read only method.


    Saturday, September 7, 2013 3:38 PM
  • I have tried deleting these manually, but there are thousands and no way that I see to delete them in bulk.

    Tuesday, October 1, 2013 3:25 PM
  • All you just need to do is 4 steps on the Lync server

    1. Check what you have on -EnableExchangeContactSyc by doing c:\get-csuserclientpolicy. And make        is set to false by doing Set-CsClientPolicy global -EnableExchangeContactSync $False if you only have one policy but if you have another group policy apart from the global e.g. Accounting and you want to apply it to the group. Do c:\Set-CsClientPolicy -identity "accounting" -EnableExchangeContactSync $False

    2. Do C:\Update-Csuserdatabase (this update client database)

    3. Do C:\Update-CsAddressBook (this update client address book)

    4. Do C:\Invoke-CsManagmentStoreReplication (this replicate changes to all Lync servers)

    Give it five minute and all should be fine but some users might need to exit from Lync and sign in again to see changes.

    -Abu Lasisi

    Tuesday, January 14, 2014 3:51 PM
  • All of these contacts have a note "This contact was added from Microsoft ® Lync 2010."

    I searched for this note and removed all contacts with the note in them.

    Not too bad...


    Friday, January 17, 2014 10:21 PM
  • why is it read only in outlook but not in owa?


    Monday, January 20, 2014 8:36 PM
  • Hello All-

    Quick update to this thread.  There is now a KB article with a solution to the problem here:



    Thursday, May 8, 2014 3:26 PM
  • I was able to fix this issue on my clients (Lync 2013, Outlook 2013, Exchange 2010) by:

    • Verify the Lync client was patched (Lync 2013 - 15.0.4517.1005 or newer, Lync 2010 - 4.0.7577.4419 or newer)
    • Close Lync client and Outlook client
    • Open up OWA for the user and navigate to Contacts
    • Remove the "Lync Contacts" folder

    As Sean pointed out, there is a KB that details the patch and references a contact removal tool but you must go through MS support to obtain the tool.  I wanted to fix this without having to wait, and since I'm on Exchange 2010 I could still delete via OWA.  Apparently 2013 isn't so friendly but I can't verify that behavior.  I also didn't turn off EnableExchangeContactSync, as I find that feature useful.

    Wednesday, January 21, 2015 7:27 PM