Hi All, I've just migrated from Domino to Exchange 2007 SP3 on a Hyper-V client running Windows Server 2008 R2, with 8 GB of RAM, 500GB static Hard Disk space (not partitioned) running about 250 mailboxes all at 1GB, and a dedicated LAN Port running through a gigabit core switch. The problem I have is that the message queue is taking a while to clear, causing delays of up to 30 minutes on mail delivery. I've determined that it is not a cpu or RAM issue as these are not maxing out, and my network port isn't being overloaded so I'm leaning toward the problem being messages getting from the queue to the Information Store, however I haven't found any good articles on how to confirm or troubleshoot this (If that really is the issue). Please assist. Note: I'm posting from Papua New Guinea, hence the long wait between replies to this post.

Hi Derrick, You can install the Exmon for debug this issue. Use the Microsoft Exchange Server User Monitor to gather real-time data to better understand current client usage patterns, and to plan for future work. Administrators can view several items, including IP addresses used by clients, versions and modes of Microsoft Office Outlook, and resources such as CPU usage, server-side processor latency, and total latency for network and processing. Works with Microsoft Exchange Server 2000, 2003, 2007 and 2010. http://www.microsoft.com/en-us/download/details.aspx?id=11461

Hi Derrick, You can install the Exmon for debug this issue. Use the Microsoft Exchange Server User Monitor to gather real-time data to better understand current client usage patterns, and to plan for future work. Administrators can view several items, including IP addresses used by clients, versions and modes of Microsoft Office Outlook, and resources such as CPU usage, server-side processor latency, and total latency for network and processing. Works with Microsoft Exchange Server 2000, 2003, 2007 and 2010. http://www.microsoft.com/en-us/download/details.aspx?id=11461

Thanks Selcuk, I'll try running the program and post the results

Thanks Selcuk, I'll try running the program and post the results

Hi It is hard to troubleshoot your error. Maybe you enable smtp log and find error.Terence Yu TechNet Community Support

Hi It is hard to troubleshoot your error. Maybe you enable smtp log and find error.Terence Yu TechNet Community Support

I've done some extra troubleshooting and found the probable cause, I ran the windows performance monitor and found that the average disk queue length is constant over 30. So moving Exchange to a new server, partitioning the new hard disks (raid 5) into 3 sections; for the OS, Storage and Logs respectively.

I've done some extra troubleshooting and found the probable cause, I ran the windows performance monitor and found that the average disk queue length is constant over 30. So moving Exchange to a new server, partitioning the new hard disks (raid 5) into 3 sections; for the OS, Storage and Logs respectively.

To clarify my last post, the message queue is sitting on the same partition as the Mailbox store, and seems to be causing some I/O errors on the Hard disk. I've decided against building on the new server, instead I'll just add these to the current Hyper-V host (as extra partitions), assign them to the current Hyper-V Client and move the Information store, and the Message queue to the two new partitions so we have The OS, Information Store and the Mail Queue sitting on their own partitions to ease the load on HD I/O. The original setup of the Hyper-v host HD arrays wasn't planned out properly so will make the changes. A quick article that pointed me down the right track: http://searchexchange.techtarget.com/tip/Changing-the-Exchange-Server-local-delivery-queue-directory

Mail queues normal now after they were switched to the new partition with the logs, I/O for the hard disk operating normally.