License Install Failed For License Type: 1 Result Code: 0xc03f6601 Free

Compare this with the license key you are trying to install. They must match exactly. You cannot install a Server Standard key on a Datacenter OS without reinstalling the OS.

This error typically appears during the installation or activation phase, preventing you from using Word, Excel, PowerPoint, or Outlook. If you are reading this, you’ve likely tried reinstalling Office, running the troubleshooter, or even restarting your PC—only to be met with the same red text. Compare this with the license key you are trying to install

Re-register Office licenses: