A clear path to sign-in.
How Cresveil intends to use Microsoft account authentication for Minecraft: Java Edition.
Cresveil has not claimed approval from Minecraft Services. Microsoft account access in publicly distributed versions depends on the necessary application registration being authorized.
Microsoft handles your sign-in.
For Microsoft account authentication, the intended flow opens Microsoft's own sign-in experience. You should never need to provide your Microsoft password to the Cresveil website. The launcher uses authorized sign-in results for Xbox and Minecraft Services authentication and the account/entitlement checks required by those services.
Start the sign-in process in the launcher.
Use Microsoft's official account sign-in.
Authenticate with Minecraft Services and validate game ownership where required.
Use a configured installation after authentication succeeds.
Local development accounts
Development-only local profiles are separate from official Microsoft-authenticated accounts. A local username is not proof of game ownership and does not grant access to Microsoft or Minecraft online services.
Independent from Minecraft
Cresveil is an independent third-party launcher. It is not an official Minecraft, Mojang Studios, Xbox, or Microsoft application, and no affiliation or endorsement is implied.