Endpoint not update

Dear,

i have only one endpoint 12.1.7166.6700 that not update virus def. 

in sepm log i haven't problem:

An update for Virus and Spyware Definitions Win32 was successfully installed. The new sequence number is 170525022.

But in GUi and in SEPM I read that is not updated since 14/05/2017.

I have lauched the manual intelligent update but i have an error:

VIRSCAN.zip is not authorized for deployment. Error code : 104

How can I solve ?

Thanks