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

: Failure to upgrade Windows Pro to Enterprise because the device isn't properly synced with a Microsoft 365 license.

This error typically indicates a mismatch between the license you are trying to install and the edition of the operating system or the licensing role currently configured. : Failure to upgrade Windows Pro to Enterprise

Before applying a fix, verify the environment using the built-in slmgr tool. Have a different license error

Have a different license error? Let us know in the comments below! When a user performs a clean installation of

This is the most common scenario. When a user performs a clean installation of Windows Server (e.g., Server 2016, 2019, or 2022) without a product key initially (selecting "I don't have a product key"), the OS installs a default "KMS Client Setup Key." Later, when the user attempts to enter a or a Retail key: