The standard online activation servers for Office 2010 were officially shut down in 2021-2023 depending on region. You will likely see:
But here’s the catch: Between dead activation servers, SHA-1 deprecation, and Windows 11 compatibility quirks, you need a roadmap. Microsoft Office Professional Plus 2010 --INSTALL
That means your key is a volume license (MAK/KMS) not suitable for phone activation. You need a KMS host or a retail key. The standard online activation servers for Office 2010
Since updates are no longer served via Windows Update for Office 2010, manually download the latest rollup from the Microsoft Update Catalog or disable update checks in File > Options > Trust Center. and Windows 11 compatibility quirks