Deploying App in SharePoint Online - Sideloading of apps is not enabled on this site.

Its the era of Office 365 and cloud  now. On a fine day, you learned to develop app. The app is developed in Visual Studio and you are planning to deploy in your SharePoint Online site.

  • You created the developer's site
  • Developed the App
  • Then tried to deploy the App.....


Error occurred in deployment step 'Install app for SharePoint': Sideloading of apps is not enabled on this site.

Now What??? Then comes the PowerShell scripts for your rescue.....

Execute the following PowerShell scripts. 

$programFiles = [environment]::getfolderpath("programfiles")
add-type -Path $programFiles'\SharePoint Online Management Shell\Microsoft.Online.SharePoint.PowerShell\Microsoft.SharePoint.Client.dll'
Write-Host 'Ready to enable Sideloading'
$siteurl = Read-Host 'SiteUrl'
$username = Read-Host "UserName"
$password = Read-Host -AsSecureString 'Password'
$outfilepath = $siteurl -replace ':', '_' -replace '/', '_'
    [Microsoft.SharePoint.Client.ClientContext]$cc = New-Object Microsoft.SharePoint.Client.ClientContext($siteurl)
    [Microsoft.SharePoint.Client.SharePointOnlineCredentials]$spocreds = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($username, $password)
    $cc.Credentials = $spocreds
    $site = $cc.Site;

    $sideLoadingGuid = new-object System.Guid "AE3A1339-61F5-4f8f-81A7-ABD2DA956A7D"
    $site.Features.Add($sideLoadingGuid, $true, [Microsoft.SharePoint.Client.FeatureDefinitionScope]::None);
    Write-Host -ForegroundColor Green 'SideLoading feature enabled on site' $siteurl
    #Activate the Developer Site feature
    Write-Host -ForegroundColor Red 'Error encountered when trying to enable SideLoading feature' $siteurl, ':' $Error[0].ToString();


Give the Site URL, Administrator Username & Password. And then it says, "Sideloading feature is enabled on site".


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