I am using below PnP PowerShell command to add site collection level application catalog and giving me an Unauthorized error. I currently have owner access to the site.


$siteUrl = "https://site/"
Connect-PnPOnline $siteUrl

$site = Get-PnPSite

Add-PnPSiteCollectionAppCatalog -Site $site


Add-PnPSiteCollectionAppCatalog : The remote server returned an error: (401) Unauthorized. At line:6 char:1 + Add-PnPSiteCollectionAppCatalog -Site $site + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : WriteError: (:) [Add-PnPSiteCollectionAppCatalog], WebException + FullyQualifiedErrorId : EXCEPTION,SharePointPnP.PowerShell.Commands.Admin.AddSiteCollectionAppCatalog

Does 'Add-PnPSiteCollectionAppCatalog' command require more access or is this access enough for this command.


Because I was getting this error I tried the same on Developer Tanet where I am an admin on the tenant which give me below error.

Add-PnPSiteCollectionAppCatalog : Cannot invoke method or retrieve property from null object. Object returned by the following call stack is null. "TenantAppCatalog RootWeb GetSiteByUrl new Microsoft.Online.SharePoint.TenantAdministration.Tenant() " At C:\Ravi\SPO\PowerShell\Add-SiteCollectionLevelAppCatalog.ps1:8 char:1 + Add-PnPSiteCollectionAppCatalog -Site $site + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : WriteError: (:) [Add-PnPSiteCollectionAppCatalog], ServerException + FullyQualifiedErrorId : EXCEPTION,SharePointPnP.PowerShell.Commands.Admin.AddSiteCollectionAppCatalog

1 Answer 1


1) You need SharePoint tenant admin access to enable Site collection app catalog. It is assumed that the we already have a tenant app catalog. If its not present, you need to create that first and then run the PS to add SCA.

2) Add-PnPSiteCollectionAppCatalog commandlet accepts the parameter Site which can be a string or Site object .

So, you can also use the command as below:

Add-PnPSiteCollectionAppCatalog -Site 

References -

Using Site collection app catalog


  • You are partially correct. 1) Correct on this. I was also facing some other error on my development tenant. The reason for the error was, in development tenant I did not have Tenant Level Application Catalog and because of that, I could not create Site Collection Level Application Catalog. 2) Add-PnPSiteCollectionAppCatalog can have site object as a parameter. If you look at the example on the link that you shared uses site object and not the url. Jun 8, 2018 at 2:50
  • @RaviKhambhati - thanks, corrected. Could please mark it as answer if it helped you ? Jun 8, 2018 at 5:13

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