Windows Server 2008 R2 Activation Error 0x80072f8f -

slmgr /ato If still fails with 0x80072f8f , try phone activation:

slmgr /ipk <your_KMS_client_key> slmgr /skms <your_KMS_server> slmgr /ato If using MAK: Windows Server 2008 R2 Activation Error 0x80072f8f

Here’s a to fix Windows Server 2008 R2 activation error 0x80072f8f . What does error 0x80072f8f mean? This error typically means: “The date and time of your computer are not synchronized with the activation server’s certificate validity period.” slmgr /ato If still fails with 0x80072f8f ,