Exchange 2003 server taking all my bandwith at a specific time every other morning

Recently my exchange box started taking all of my bandwidth starting at a specific time?  I need to reboot the server and then all is fine "for now".  Once it starts, it consumes all of my bandwidth and everything stops (goes to a crawl) and renders the network useless.
Montana ManIT SupportAsked:
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Simon Butler (Sembee)ConsultantCommented:
Do you mean internet bandwidth?
If so, then you need to start looking at what happens at that time. AV software doing updates would be one guess, backup software going to the cloud, user synchronising something large which doesn't complete.
There is nothing in Exchange that could do it.

Simon.
Montana ManIT SupportAuthor Commented:
could it be a DOS attack or a Broadcast storm attack?
Montana ManIT SupportAuthor Commented:
Sorry we have a MPLS configuration so yes internet and the mpls production side.
Simon Butler (Sembee)ConsultantCommented:
If it was a DOS or something like that, then it would be constant.
There has to be a trigger of some description, but that doesn't mean it is on the server itself.
You need to look at scheduled tasks, event viewer etc for the time it occurs.

Simon.

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