License Install Failed For License Type: 1 Result Code: 0xc03f6601 ((link)) Today

In plain English: Office found a license on your computer, but it doesn’t match the current installation, product key, or Microsoft account. Alternatively, a previous license is stuck in the system, blocking the new one.

slmgr /ipk Your-New-Product-Key

In corporate environments, this error often appears due to an overzealous Group Policy. In plain English: Office found a license on