In liveHive you can switch to use your company's server instead of LiveHive's server. The settings are under the Admin Tab.
1) Login to your account
2) Click the Admin Tab then select Email Server. Here you can choose LiveHive server or your company's server.
3) Then select server type (Exchange or SMTP)
4) Then login as the administer for that account. After this is done each Team member will be able to switch from LiveHive servers to your companies servers.