Skype for Business client – force address book download

If you’re using the next version of Office (That’s Office 2016, Preview available for download here), you’re already using the new Skype for Business client.


If you used Lync before and now you find that your address book is not up to date and you get the “Address book synchronizing. Results may not be current” message, you might want to force your client to download the address book.

This is a fairly simple task, and it’s quite similar to the workaround from the Lync 2010 and 2013 clients; all you need to do is add a registry key and you’re done.
If you already added this registry in the past, you’ll notice it stopped working, and here’s the reason:
The registry key we’re using for this is:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Office\15.0\Lync\GalDownloadInitialDelay with a value of ‘0’.

But if you go to %userprofile%\AppData\Local\Microsoft\Office you’ll see that you now have a 15.0 folder and a 16.0 folder:

16FolderThis needs to be presented in the registry too.
So add the following key to your registry using an elevated command prompt window:

reg add HKLM\Software\Policies\Microsoft\Office\16.0\Lync /v GalDownloadInitialDelay /t REG_DWORD /d 0 /f

Exit the client, delete the two GalContacts files from your SIP_Username folder under the 16.0\Lync folder and restart the client.


You’re address book will be immediately downloaded to your client.

10 thoughts on “Skype for Business client – force address book download

  1. I don’t have either of the GalContacts files. I’m running Office 2016 and Windows 10. Only thing in my SIP folder is a ton of .cache files.

      1. Me neither, i added the registry key and restarted skype for bussiness but it is still not working.

  2. Thanks for the post, in the text you state to apply the value of 1 to the reg entry then 0 in the registry command. 0 being false is this correct value to apply. Cheers.

    1. Hi Matt,
      ‘0’ is the correct value, as the command suggests. Thanks for pointing my attention to this inconsistency.

  3. Thank you for this articale. Would this apply to all users on a Server 2012 R2 terminal server?

    Thanks again!

    1. Generally I recommend to use the Web server rather than the local address book.
      On a terminal server this action could consume too many resources – Use with caution if you choose to.

  4. Dear all,
    I’ve tried all steps here above and nothihg happens… find field in SFB only find contacts if I type the complete email address. Absolutely no results before, searching still in progress with no result. may be a server access error? Strange that in the DB (GalContacts.db) in sip_xxxxxxx seems to be ok… thanks everyone for your help.

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