Failed password for invalid user

Dear All ,

I have created a user named X and gave sudo permissions for it , So that it can access some commands as root.

This particular user can login to the server using SSH login through putty any where with in the network.

But there is some issue , when the same user is trying from UCMDB tool ( HP tool for discovery of machines ) through SSH protocol , it says connection failed.

On seeing the /var/log/secure in the Linux Server , it says the below log

Failed password for invalid user <username> from 172.X.X.X port 49401 ssh2

Can any body throw some light on this.

Thanks and Regards ,
Rj