: If purchased digitally from Microsoft, sign in to your Microsoft Account Order History to view your one-time purchase details.
When calling, if the automated system doesn't work, stay on the line to be transferred to a support agent who may be able to assist with a legitimate key. Microsoft-Office-2010-Product-keys-plus-Activation-keys-Free
: Search your inbox for a digital receipt or confirmation email from when the software was originally purchased. : If purchased digitally from Microsoft, sign in