Without the use of some shady, third-party tools, you can't. Starting in 2013, only the last 5 digits of the key are stored locally. You can find those in the Registry or via cmd, but prob won't help much in this situation.
Can't find my installed Microsoft Office Professional Plus 2021 serial key
Hi there, folks, how can I find my Microsoft Office Professional Plus 2021 serial key on my installed PC? I have accidentally deleted my emails containing this serial when I spring cleaned my email account. I tried Belarc Advisor but only it showed a partial key and was of no use.
I purchased the key from a 3rd party seller on Amazon many years ago now, but they are no longer on Amazon.
Many thanks in advance
Robert
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Jiajing Hua-MFST 7,315 Reputation points Microsoft Vendor
2024-04-15T06:16:58.09+00:00 Hi @R. T. D
For the security reasons, on the machine on which Office is installed, we cannot find the full activation key.
For phone activation, please try rohnski2's steps in thread 'Office 2021 offline activation'.
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