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Old 09-12-2006, 03:00 PM   #1 (permalink)
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BES 4.0 Service Pack 4 hot fix 3 for Exchange
Exchange 2003 – 5000 users
600 BES users on one HP DL580 Dual Processor and 4GB of Memory
All the above servers are on the same network segment connected by CISCO gear

I’m as frustrated as Don Juan on a gay cruise. I have been experiencing 20 minute to 1 hour delays in delivery to our handheld devices. The cause of this according to t-support, is hung threads and also mail is being delivered by BES rescanning the mailboxes instead of receiving a UDP notification that email has hit the mailbox.

Their theory is that the Exchange servers are too overloaded to respond the BES‘s MAPI calls. My Exchange system has a problem. Okie dokie fine. I have 7K users sending and receiving on average 750K – 1 million messages a week with out fail using evil MAPI. How can this complex, clustered, revenue generating system work so well with our users and applications and fail so miserably when it comes to BES.

Also, what fixes this problem (which occurs at least 3 times a week) is a reboot of the BES. So….rebooting the BES fixes my Exchange servers…which are having no other problems…not even breaking a sweat.

Other than the Exchange servers does anyone know what could be causing this issue? What would prevent UDP notifications between servers?
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Old 09-13-2006, 05:15 AM   #2 (permalink)
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What is the spec for the exchnage server, the best thing to remember is that 1 BES user = 4 Outlook client users, so if you mutiply your 600 BES users by 4this is the equivilant of having 2400 exchnage users added to your system.

There are also other factors which can affect mail delivery delays, the most common is the AD/Ex2K3 permission setup. Which is covered in detail in earlier threads.

Another issue which i have seen and get is memory leakage, which is referenced at A third-party MAPI program stops responding, and Exchange Server 2003 intermittently does not deliver messages and relates to emsmdb32.dll problems with versions prior to6 .5.7233.36. This is an Exchange issue which affects 3rd party MAPI apps, which may also be affecting the system.

The specs on your BES server seem o.k for the number of users you have.

I would recommend that you run some perfmon stats on your BES server and monitor the memory. Log it to a .csv file and you can create a graph form it in excel, this is good to see how the memory on the BES is doing as if you find it starts to nose dive and does not recover, this will cause issues.
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Old 09-13-2006, 05:16 AM   #3 (permalink)
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left off the ms link, look for KB898782 on the ms support website.
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