Feature Description Feature Scope   Feature ID  Problem
PSWApproval Feature Site collection ad739f9e-1525-4dec-a25e-10821ca70c95    Not activated
GlobalHold Feature  Site collection 2a6bf8e8-10b5-42f2-9d3e-267dfb0de8d4    Not activated
PWAWebParts Feature Site collection 10eb8dad-31aa-4461-9843-27305d0c7c93    Not activated
PwaIdeaList Feature Site collection ce0143de-6894-428b-9f6b-37bd6848ec26    Not activated
PWARibbon Feature   Site collection 1d253548-c70d-40fd-9930-9d313bedc359    Not activated
MobileExcelWebAccess Feature    Site collection e995e28b-9ba8-4668-9933-cf5c146d7a9f    Not activated
This template can't be used for this site collection until the issues above are resolved.

#Required Parameters
$sSiteColUrl = "https://portal.sharepoint.com"
$sUserName = "admin@portal.com"
$sFeatureGuid="2a6bf8e8-10b5-42f2-9d3e-267dfb0de8d4"
$sPassword = Read-Host -Prompt "Enter your password: " -AsSecureString

#Script that enables a feature in a SPO Site
# Required Parameters:
#  -> $sUserName: User Name to connect to the SharePoint Online Site Collection.
#  -> $sPassword: Password for the user.
#  -> $sSiteColUrl: SharePoint Online Site Collection
#  -> $sFeatureGuid: GUID of the feature to be enabled


    $host.Runspace.ThreadOptions = "ReuseThread"

    #Definition of the function that allows to enable a SPO Feature
    function Enable-SPOFeature
    {
        param ($sSiteColUrl,$sUserName,$sPassword,$sFeatureGuid)
        try
        {
            #Adding the Client OM Assemblies
            Add-Type -Path "C:Program FilesCommon FilesMicrosoft SharedWeb Server Extensions15ISAPIMicrosoft.SharePoint.Client.dll"
            Add-Type -Path "C:Program FilesCommon FilesMicrosoft SharedWeb Server Extensions15ISAPIMicrosoft.SharePoint.Client.Runtime.dll"

            #SPO Client Object Model Context
            $spoCtx = New-Object Microsoft.SharePoint.Client.ClientContext($sSiteColUrl)
            $spoCredentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($sUsername, $sPassword)
            $spoCtx.Credentials = $spoCredentials

            Write-Host "----------------------------------------------------------------------------"  -foregroundcolor Green
            Write-Host "Enabling the Feature with GUID $sFeatureGuid !!" -ForegroundColor Green
            Write-Host "----------------------------------------------------------------------------"  -foregroundcolor Green

            $guiFeatureGuid = [System.Guid] $sFeatureGuid
            #############################################
            # todo: change object: $spoSite=$spoCtx.Site | $spoSite=$spoCtx.Web
            $spoSite=$spoCtx.Site

            # todo: change scope: [Microsoft.SharePoint.Client.FeatureDefinitionScope]::None | Farm | Site | Web
            # https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.client.featuredefinitionscope.aspx?f=255&MSPPError=-2147217396
            $spoSite.Features.Add($sFeatureGuid, $true, [Microsoft.SharePoint.Client.FeatureDefinitionScope]::None)
            #############################################

            $spoCtx.ExecuteQuery()
            $spoCtx.Dispose()
        }
        catch [System.Exception]
        {
            write-host -f red $_.Exception.ToString()
        }
    }

    #Required Parameters
    $sSiteColUrl = "https://portal.sharepoint.com"
    $sUserName = "admin@portal.com"
    $sFeatureGuid= " e995e28b-9ba8-4668-9933-cf5c146d7a9f"
    $sPassword = Read-Host -Prompt "Enter your password: " -AsSecureString

    Enable-SPOFeature -sSiteColUrl $sSiteColUrl -sUserName $sUserName -sPassword $sPassword -sFeatureGuid $sFeatureGuid