user decision without logon in SAP

Hi guru,

please, could you explain me how I can accept or reject a request ( purchase prder, requisition order, travel request... ) pushing a button in outlook mail without to use SAP Logon? Do I need to use a custom task in user decision or I need to configure SWNCONFIG? and in this case, please could you post a link where it is clearly explained how to use this transaction?

Thanks

Regards

Raffaele