Dear MSFT Engineers,We are planning to migrate our mailboxes from Shanghai(Exchange Server 2003 SP2) to US Headquater(Exchange Server 2007 SP2) this year. Actually, we have migrated 10 mailboxes so far. We use 10M MPLS links between the 2 sites. I'm not quite sure if 10M is sufficient for over 400 RPC sessions in future. How can I arrange a pressure test in advance in case there is a poor performance after 400 mailboxes are migrated?On top of my head, I plan to open a number of outlook application of a migrated mailbox and check if the average response time changes. Or I can use a 3rd party application which can send hundreds of mails(spam?) at one time. Which one do you think is more feasible or you have better solutions?Any ideas will be greatly appreciated.TIA.BR//JohnnieBest regards,Johnnie Li

Microsoft publishes guidelines for Outlook connectivity and bandwidth. http://technet.microsoft.com/en-us/library/cc540453(EXCHG.80).aspx Using Outlook Cached Mode will mitigate and mask some of the bandwidth issues, and I would strongly recommend you use it in your particular implementation, but it doesn't eliminate bandwidth as a consideration.-- Ed Crowley MVP"There are seldom good technological solutions to behavioral problems.". "Johnnie Li" wrote in message news:ecd190ac-e01c-4ed5-b1f8-b25ee6a0d55d... Dear MSFT Engineers,We are planning to migrate our mailboxes from Shanghai(Exchange Server 2003 SP2) to US Headquater(Exchange Server 2007 SP2) this year. Actually, we have migrated 10 mailboxes so far. We use 10M MPLS links between the 2 sites. I'm not quite sure if 10M is sufficient for over 400 RPC sessions in future. How can I arrange a pressure test in advance in case there is a poor performance after 400 mailboxes are migrated?On top of my head, I plan to open a number of outlook application of a migrated mailbox and check if the average response time changes. Or I can use a 3rd party application which can send hundreds of mails(spam?) at one time. Which one do you think is more feasible or you have better solutions?Any ideas will be greatly appreciated.TIA.BR//Johnnie Best regards,Johnnie Li Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Thanks Ed, I noticed in this white paper the formula is established on the assumption that all the users are located in the same time zone. What if the server is in US(Pacific standard time) whilst the 400 clients are in China(Beijing Time), say in my scenario? Best regards,Johnnie Li

That shouldn't be a problem.-- Ed Crowley MVP"There are seldom good technological solutions to behavioral problems.". "Johnnie Li" wrote in message news:3544375a-1bdb-4bdb-a59d-1a62ebea129f... Thanks Ed, I noticed in this white paper the formula is established on the assumption that all the users are located in the same time zone. What if the server is in US(Pacific standard time) whilst the 400 clients are in China(Beijing Time), say in my scenario? Best regards,Johnnie Li Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."