Registering an add-in for SharePoint is easy enough. You go to the _layouts\/appregnew.aspx page for the site and register the add-in.<\/p>\n\n\n\n
Permissions are set when the add-in is installed on the site too. This happens after you’ve clicked Trust It when adding the add-in to a site.<\/p>\n\n\n\n
To revoke the permissions for an add-in in a site is also straight forward. To do this, you go to the _layouts\/appprincipals.aspx page and click the delete icon next to the add-in you want to revoke permissions for. Or for a specific web, add ?Scope=Web<\/em> to the URL.<\/p>\n\n\n\n There’s no admin page for unregistering and add-in for a site though. To do this, we can run some PowerShell. This does require a hybrid installation where you still have access to the SharePoint farm itself and can run SharePoint PowerShell cmdlets.<\/p>\n\n\n\n\n\n\n\n The following script shows how to:<\/p>\n\n\n\n To unregister we need to call the static method GetManager<\/a> from the SPAppPrincipalManager<\/a> class. There’s currently no PowerShell cmdlet that allows you to do this.<\/p>\n\n\n\n You then need to call the DeleteAppPrincipal<\/a> method and pass it the principal object we retrieved for the add-in.<\/p>\n\n\n\n Useful if you want to completely remove an add-in from a site\/site collection.<\/p>\n","protected":false},"excerpt":{"rendered":" Registering an add-in for SharePoint is easy enough. You go to the _layouts\/appregnew.aspx page for the site and register the add-in. Permissions are set when the add-in is installed on the site too. This happens after you’ve clicked Trust It … Continue reading \nasnp Microsoft.SharePoint.PowerShell\n\n# Replace with the add-in's client id\n$clientId = "33b85512-e4b1-529c-e012-410e676bef09"\n$site = Get-SPSite "url to the SP site"\n$realm = Get-SPAuthenticationRealm -ServiceContext $site\n$appId = $clientId + "@" + $realm\n\n# Get the add-in principal for the site\n$principal = Get-SPAppPrincipal -NameIdentifier $appId -Site $site.RootWeb\n\n# Remove the permissions that were granted for this add-in in the site\nRemove-SPAppPrincipalPermission -AppPrincipal $principal -Site $site.RootWeb -Scope Site\n\n# Set the Scope parameter to SiteCollection to apply this to the site collection instead of just the web\n\n# Now to unregister the add-in\n$appManager = [Microsoft.SharePoint.SPAppPrincipalManager]::GetManager($site.RootWeb)\n$appManager.DeleteAppPrincipal($principal)\n<\/pre><\/div>\n\n\n