Connect-ExchangeOnline -UserPrincipalName user@domain.onmicrosoft.com Get-PublicFolder -Identity "\" -Recurse -ResultSize unlimited Get-PublicFolder -Identity "\" -Recurse -ResultSize unlimited | Remove-PublicFolderClientPermission -User default Get-PublicFolder -Identity "\" -Recurse -ResultSize unlimited | Add-PublicFolderClientPermission -User default -AcccessRights owner