Exchange 2003 losing emails

My client had a fully running exchange server untill this week. Some users are not receiving all their mails coming into their mailboxes. It is not all users. I can send an email to myself from some users and receive it, and reply to it and it goes into their mail box, others, they do not see it in their mailbox.

Server has been working fine, and has been rebooted several times,, No event logs are being logged to indicate what is going on. I can look at Exchange message tracking for a user and see all the mail sent to them over a particular day and time frame, but all the mail is not in their mailbox, only some of it.

Running Trend WFB for years on it without incident,

I do not know if it is affecting all users or just some. I sent a user an email and tracking reports it came in, but not showing in mailbox, but I sent an email to myself from a users OWA login and got it and replied to the mail and it went into the mailbox, very wierd.

Any help is appreciated..I can't say exactly what happened when, something went wrong in the past 5-7 days I would say, and with the holiday time off, not noticed until now ?


Thanks
Kevin CaldwellOwner of RUseeingRed Tech SolutionsAsked:
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Kevin CaldwellConnect With a Mentor Owner of RUseeingRed Tech SolutionsAuthor Commented:
Seems this issue may have been caused by Trend.. The email scanning, and other aspects of exchange was turned off, the the Trend Micro security master service seemed to be the issue,, after a call to trend, and reinstalling the SMEX app pool, and resetting the exchange SMTP connectors, it straightened itself out.

Thanks.
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sysreq2000Commented:
Did you check all the problem accounts with OWA, to make sure it's not an issue with Outlook?
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Kevin CaldwellOwner of RUseeingRed Tech SolutionsAuthor Commented:
OWA was not a factor in the problem, Once I called Trend, and reset the SMEX App Pool, it got fixed.
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