I remotely mange(mostly) this network consist of a Sonicwall Router(TZ210), Win Server 2008 R2 + Exchange Server 2010 on a Dell PE T710 box. My questions is what built-in or Free/Less expensive software tools I can use to monitor the health of the system. Mainly something that can remotely(if there is any) notify if there is any issue with the followings:
1. Network Connectivity
2. Server health(drive failure etc.)
3. Any issues with Windows Server or Exchange Server
Please advise if I should use any particular tools/utilities periodically.
Thanks for your advice.