Iíve been reading this thread titled howtogeekhow-to-configure-a-pop3-email-account-in-windows-10 - I set it up & it works

but i need to be able to set it to remove mail from the server - this setting has always been an option with PO3 accounts -



but in Mail Version 16005.10827.20186.0 - in Account Settings - the change Sync Settings is greyed out (this is where I assume the setting to remove mail would be

any tips??