Hi Dennis,
I have answered all your questions below:
1) can you tell me the best place to monitor the resources?
:- You can monitor the resources from the Task Manager.
2) Is there a way I can set up an alert for I/O usage?
:- Yes you can setup but as this is a virtual environment there are some limitations to it so we won't recommend you to setup alert for the I/O usage.
3) Am am interested in the backup solution you mentioned, where can I find details?
:- You can check the offsite backup plans at
Backup Service | Offsite Data Backup Solutions | Web Hosting UK | Dedicated Server | VPS Hosting
4) The Horde webmail is still as slow as I have reported before in the support ticket, how can this be resolved?
:- One of our Windows Admin is working on the Horde Webmail issue, he will update you in the support ticket.