DHCP service being sent start and stop controls

I've joined as system admin from desktop support and we have SCOM monitoring our servers. Critical alerts are reported to us via SMS to our mobiles.

Two weeks ago we got a Network File Access sms because the dhcp service on the File/Print cluster was stopped and started by a admin account called "xadmin" (exchange admin).

I checked the event log and this has been happening on/off since OCt 2007.

Event Type:      Information
Event Source:      Service Control Manager
Event Category:      None
Event ID:      7035
Date:            1/28/2008
Time:            6:56:49 PM
User:            company\xadmin
Computer:      companyCL1N2
Description:
The DHCP Client service was successfully sent a stop control.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Event Type:      Information
Event Source:      Service Control Manager
Event Category:      None
Event ID:      7035
Date:            1/28/2008
Time:            6:56:52 PM
User:            company\xadmin
Computer:      companyCL1N2
Description:
The DHCP Client service was successfully sent a start control.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Event Type:      Information
Event Source:      Service Control Manager
Event Category:      None
Event ID:      7035
Date:            1/28/2008
Time:            7:42:38 PM
User:            company\xadmin
Computer:      companyCL1N2
Description:
The WinHTTP Web Proxy Auto-Discovery Service service was successfully sent a start control.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Event Type:      Information
Event Source:      Service Control Manager
Event Category:      None
Event ID:      7035
Date:            1/28/2008
Time:            7:43:28 PM
User:            company\xadmin
Computer:      companyCL1N2
Description:
The Backup Exec Remote Agent for Windows Servers service was successfully sent a start control.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

What could be the reason? Manual ip set on this cluster all the time - no dhcp ip provided to it.