User Account on Asset Report is not being Generated

Does the user show on the asset in the scan data?  

Refer to resolution 2 in KB0019561 for steps to check scan data. 

What are the parameters you selected?  Make sure you selected the correct Smart Group, Workgroup and the Scan. Also make sure that the scan you selected has the detailed discovery results of those 4000 servers.

-Prudhvi

Thanks @GloriaB , I think resolution 2 in  KB0019561 worked for me. So we need to rescan the assets using smart rule only, I tried to do the same and it worked for me. I have scheduled all the scans per 21 days then it should work automatically for me!!