A customer of mine wants to disable sync for all Groups doclibs.AFAIK there is not a global setting for this.I know that it is possible to do it manually for every single doclib in the advanced library settings, but such approach is impractical for hundreds of Groups.Can someone point me to an existing script for doing it for all Groups in a tenant?TIA.cc jcgonzalezmartin SanthoshB1 TonyRedmond

Looks like it was still reading from my older version of CSOM, but got it working quick and dirty: Add-Type -Path "C:\SP\Microsoft.SharePointOnline.CSOM.16.1.6112.1200\lib\net45\Microsoft.SharePoint.Client.dll" Add-Type -Path "C:\SP\Microsoft.SharePointOnline.CSOM.16.1.6112.1200\lib\net45\Microsoft.SharePoint.Client.runtime.dll" # SharePoint Authentication $username = "<username here>" $password = '<password here>' $securePassword = ConvertTo-SecureString $Password -AsPlainText -Force $credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($username, $securePassword) Write-Host "Fetching O365 Groups" -ForegroundColor Yellow $o365Groups = get-unifiedgroup $count = 0 foreach($group in $o365Groups){ $count++ Write-Host "" Write-Host $count $group.DisplayName $group.primarysmtpaddress -ForegroundColor Cyan $clientContext = New-Object Microsoft.SharePoint.Client.ClientContext($group.SharePointSiteUrl) $clientContext.Credentials = $credentials if ($clientContext.ServerObjectIsNull.Value) { Write-Host "Unable to connect to: '$url'" -ForegroundColor Red } else { Write-Host "Connected to: '$($group.SharePointSiteUrl)'" -ForegroundColor Green $Libraries = $clientContext.Web.Lists $clientContext.Load($Libraries) $clientContext.ExecuteQuery() foreach($Library in $Libraries){ if($Library.BaseTemplate -eq "101"){ Write-Host $Library.Title $Library.ExcludeFromOfflineClient=$true $Library.Update() } } } }

You should be able to "temporary" hide the "sync" action in the Groups Library using CSOM (Client Side Object Model) in a PowerShell script...and I say "should" because in the past I have found some weird problems when using CSOM with Groups sites...but this should not be the case anymore since a Group site is a modern site. By the way, I have a script that hides the sync action for a document library in SPO using CSOM: https://gallery.technet.microsoft.com/How-to-enabledisable-sync-8ad53996?redir=0 (Bear in mind you will need to use at least August 2016 version of CSOM...I recommend you to use the once released by Microsoft yesterday (https://jcgonzalezmartin.wordpress.com/2017/01/28/office-365-january-version-of-spo-csom-just-released/)....and to get the CSOM assemblies via NuGet using PowerShell just follow this post: https://jcgonzalezmartin.wordpress.com/2017/01/09/tips-tricks-how-to-install-a-nuget-package-without-visual-studio-installed/Finally, you will need to buy the code to get the all the Groups sites in the tenant. You can use this post as a starting point : http://www.andrewjbillings.com/enumerating-sharepoint-sites-for-office-365-groups-with-powershell/

I took a stab at this using the scripts already created by jcgonzalezmartin and Brent Ellis along with the site iteration scripts here. This will set the Offline Client Availability at the web level initially for the site you enter and give you the option to do all subsites (I edited the original to include all levels of subsites based on this super handy script here and not just level 1). I tested this on Group and Classic sites. It certainly could be cleaned up a bit and be enhanced to support things like .csv input and probably overall more optimized. Add-Type -Path "C:\temp\microsoft.sharepointonline.csom.16.1.6008.1200\lib\net45\Microsoft.SharePoint.Client.dll" Add-Type -Path "C:\temp\microsoft.sharepointonline.csom.16.1.6008.1200\lib\net45\Microsoft.SharePoint.Client.runtime.dll" $siteUrl = Read-Host -Prompt "Enter Site Collection URL" $username = Read-Host -Prompt “Enter username” $password = Read-Host -Prompt “Enter password” -AsSecureString $subwebcheck = Read-Host -Prompt "Do you want to process subsites? (Y/N)" # Generate ClientContext function so we can reuse function GetClientContext($siteurl, $username, $password) { $ctx = New-Object Microsoft.SharePoint.Client.ClientContext($siteurl) $credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($username, $password) $ctx.Credentials = $credentials return $ctx } $ctx = GetClientContext $siteurl $username $password if ($ctx.ServerObjectIsNull.Value) { Write-Host "Unable to connect to: '$siteUrl'" -ForegroundColor Red } else { Write-Host "Connected to: '$($siteUrl)'" -ForegroundColor Green $rootWeb = $ctx.Web $ctx.Load($rootWeb) $ctx.ExecuteQuery() # update root site Write-Host $rootWeb.Url "is being updated to exclude from offline clients" $rootWeb.ExcludeFromOfflineClient=$true $rootWeb.Update() $ctx.Load($rootWeb) $ctx.ExecuteQuery() Write-Host "ExcludeFromOfflineClient is now" $rootWeb.ExcludeFromOfflineClient "for the site:" $rootWeb.Url -ForegroundColor Green if ($subwebcheck -eq "Y") { # work with subsites Write-Host "Processing subsites..." -ForegroundColor Yellow $childWebs = $rootWeb.Webs $ctx.Load($childWebs) $ctx.ExecuteQuery() foreach ($childWeb in $childWebs) { processsubsites $childWeb.url } } # function to loop through subsites and setting values function processsubsites ($siteurl){ $ctx = GetClientContext $siteurl $username $password $rootWeb = $ctx.Web $childWebs = $rootWeb.Webs $ctx.Load($rootWeb) $ctx.Load($childWebs) $ctx.ExecuteQuery() # perform update if($rootWeb.WebTemplate -ne "APP"){ Write-Host $rootWeb.Url "is being updated to exclude from offline clients" $rootWeb.ExcludeFromOfflineClient=$true $rootWeb.Update() $ctx.Load($rootWeb) $ctx.ExecuteQuery() Write-Host "ExcludeFromOfflineClient is now" $rootWeb.ExcludeFromOfflineClient "for the site:" $rootWeb.Url -ForegroundColor Green } # loop subsites of subsites foreach ($childWeb in $childWebs) { processsubsites $childWeb.url } } }To note, Setting this property to true does not disable synchronization. Instead, it represents a recommendation to the client not to attempt synchronization. This info is pulled from here.

I just assumed you wanted sync disabled across the board. The script gets any predefined doc libs, but also any other extra libraries that are created in the Group SharePoint site. You can add an extra "if" statement to limit it to a specific Libraryif($Library.BaseTemplate -eq "101" -and $Library.Title -eq "Documents"){Substitute "Documents" for whatever language phrase the main document library is. Not sure if it can be renamed in the group, so worse case might have to check the Library URL to make sure it is Shared%20Documents.

What you could do is read the name of the document libraries you want to configure from a CSV file...and yes, I meant that a Group owner can configure the setting on

Script to mass disable sync for Office 365 Groups

TonyRedmond
MVP
Jan 28, 2017
I am sorry, but I do not know of any way to disable the ability for users to synchronize a document library via PowerShell...
- Salvatore Biscari
  Silver Contributor
  Jan 28, 2017
  Thank you, Tony.
  - jcgonzalezmartin
    MVP
    Jan 28, 2017
    You should be able to "temporary" hide the "sync" action in the Groups Library using CSOM (Client Side Object Model) in a PowerShell script...and I say "should" because in the past I have found some weird problems when using CSOM with Groups sites...but this should not be the case anymore since a Group site is a modern site. By the way, I have a script that hides the sync action for a document library in SPO using CSOM: https://gallery.technet.microsoft.com/How-to-enabledisable-sync-8ad53996?redir=0 (Bear in mind you will need to use at least August 2016 version of CSOM...I recommend you to use the once released by Microsoft yesterday (https://jcgonzalezmartin.wordpress.com/2017/01/28/office-365-january-version-of-spo-csom-just-released/)....and to get the CSOM assemblies via NuGet using PowerShell just follow this post: https://jcgonzalezmartin.wordpress.com/2017/01/09/tips-tricks-how-to-install-a-nuget-package-without-visual-studio-installed/
    Finally, you will need to buy the code to get the all the Groups sites in the tenant. You can use this post as a starting point : http://www.andrewjbillings.com/enumerating-sharepoint-sites-for-office-365-groups-with-powershell/

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Script to mass disable sync for Office 365 Groups

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