[slava]

Hello,

My Question is works ISPmanager PRO with WHMCS ???
Because i found this here: http://getisplicenses.com/whmcs

Yes, WHMCS work with our products, for more information about configuration this you nees ask WHMCS company.

And when an User has reach the Limit of Bandwidh, what happens than?

User will be stopped or not, it's can be set in the Policy menu http://en.ispdoc.com/index.php/Policy(ISPmanager) - Stop users exceeding the traffic.