Can't added new computer named with underscore

I have computer named “test_test” and banned by avast console.

Since the issue can solved by added computer name manually then I doing add manually and when I add dns host name then message error is popup.

I have attached the error message

Hello,

I have the same problem !

Have you tried to use the Job “Discover new computer” ?
For me, it was found and added a PC with underscore in the name without problem…

Yes I know about that.

I used active directory, and another computer that not join domain.
for computer not join domain can’t discovered by this Job so I need to added by manually.

I guess this a bug.

not a bug - http://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_host_names
but maybe we should remove the “_” check…

Ok, I know the reason now.
Thanks lukas