Fellow SharePointers,

Below is the  Powershell script to enable Side app loading in Sharepoint online environment.

try
{
[Microsoft.SharePoint.Client.ClientContext]$ClientContext = New-Object Microsoft.SharePoint.Client.ClientContext($siteurl)
$ClientContext.Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($username, $password)
$site = $ClientContext.Site;

$sideLoadingGuid = new-object System.Guid “AE3A1339-61F5-4f8f-81A7-ABD2DA956A7D”
$site.Features.Add($sideLoadingGuid, $true, [Microsoft.SharePoint.Client.FeatureDefinitionScope]::None);

$ClientContext.ExecuteQuery();

Write-Host -ForegroundColor Green ‘SideLoading feature is enabled now’
}
catch
{
Write-Host -ForegroundColor Red ‘Error ‘ $siteurl, ‘:’ $Error[0].ToString();
}

Happy Sharepointing!!!