SharePoint 2010/2013: Modifying the Permission Level of a Group Using Powershell
Scenerio: well I had a SharePoint group with around 50 users given Contribute permission. Then it was required to raise its permission to "Full Control". Here is how I did that using Powershell script: Adding a Permission Level $web = Get-SPWeb "http://SiteCollection" $group = $web.SiteGroups["GroupName"] roleAssignment= New-Object Microsoft.SharePoint.SPRoleAssignment($group) $role = $web.RoleDefinitions["PermissionLevel"] $roleAssignment.RoleDefinitionBindings.Add($role); $web.RoleAssignments.Add($roleAssignment) $web.Dispose() Removing a Permission Level $web = get-spweb "http://SiteCollection" $group = $web.SiteGroups["GroupName"] $roleAssignment = $group.ParentWeb.RoleAssignments.GetAssignmentByPrincipal($group) $role = $group.ParentWeb.RoleDefinitions["PermissionLevel"] $roleAssignment.RoleDefinitionBindings.Remove($role) $roleAssignment.Update() $group.Update() $web.Dispose() References https://...