Workplace Join discovery succeeded. Activity Id: NULL

Hi All,

I have setup the Windows 2012 R2, Machine one is DC and Machine two installed with Certificate and ADFS Roles.

I have followed the link http://technet.microsoft.com/en-us/library/dn280939.aspx to setup the environment.

When I login to Windows 8 machine and try Workplace Join in the Windows 8 machine event log following event is coming.

Workplace Join discovery succeeded. Activity Id: NULL. The Event ID is 100.

Can any one help me to proceed with error.

Thanks in Advance.

-SE