In short, A Windows Server 2025 Standard OEM product key cannot be used to activate Windows Server 2022 Standard. The downgrade right allows you to run the older version, but activation requires a valid Windows Server 2022 Standard activation key. The 0x80041014 error occurs because the Windows Server 2025 key is not valid for Windows Server 2022 activation.
For an OEM license, the official process is to obtain the Windows Server 2022 Standard downgrade key and/or downgrade media from the OEM manufacturer or the authorized reseller that provided the license. Microsoft Activation Support typically does not issue downgrade keys for OEM licenses; they can only assist with entitlement verification or activation issues after the correct key is obtained.
After obtaining the Windows Server 2022 Standard key, convert the evaluation installation using the Windows Server 2022 key:
DISM /online /Set-Edition:ServerStandard /ProductKey:<Windows Server 2022 key> /AcceptEula
Then activate:
slmgr /ato
The Windows Server 2025 OEM license proves the right to downgrade, but the OEM/reseller is normally responsible for providing the corresponding Windows Server 2022 activation method.
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hth
Marcin