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@mardahl mardahl/updateSfBGAL.ps1
Last active Jul 15, 2018

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Script to force update Skype for Business Clients Global Address List
Script to force update Skype for Business Clients Global Address List Written by Michael Mardahl (
(Provided AS-IS! I will not be held liable for any negative consequences)
This script will shutdown the SfB client, update the registry and delete the GAL DB, then start the client again. It should be run in the users context as it does user specific things.
Just run the script without parameters
user will need to have access to write to the registry key specified in this script.
Write-Output "Stopping SfB client" Get-Process -ProcessName lync | Stop-Process
Write-Output "Identifying Office version (2013 or 2016)" switch (Test-Path "$($env:userprofile)\AppData\Local\Microsoft\Office\16.0") { $true {$ver = "16"} $false {$ver = "15"} }
Write-Output "Adding required key to registry" reg add HKLM\Software\Policies\Microsoft\Office$ver.0\Lync /v GalDownloadInitialDelay /t REG_DWORD /d 0 /f
Write-Output "Deleting SfB Client GAL db files"
#Remember to change the text on these two lines, they should be your real domain (if in doubt, just look in that folder on your own client and see).
#You could also script a solution that fetches the users SIP address directly from Active Directory. I chose the easy way here...
Remove-Item "$($env:userprofile)\AppData\Local\Microsoft\Office$ver.0\Lync\sip$($env:username)\GalContacts.db" -force Remove-Item "$($env:userprofile)\AppData\Local\Microsoft\Office$ver.0\Lync\sip$($env:username)\GalContacts.db.idx" -force
Write-Output "Starting SfB client again" Start "C:\Program Files (x86)\Microsoft Office\root\Office$ver\lync.exe"
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