Hello,

We are trying estimate the time it will take to migrate our users from Exchange 2010 to 2013.

I understand we can migrate them in multiple batches but how many are actually moving at one time?

So if i batch migrate 20 mailboxes, are all 20 moving consecutively, or are 5 moving and 15 queued?

Hope you can understand what I'm asking.

Thanks

Lee

Hi,

There is a limit when you move mailboxex from Exchange 2010 to Exchange 2013. You can find the limit through the following path.

In Exchange 2010 (CAS):  

<Exchange Installation Path>\Program Files\Microsoft\Exchange Server\V14\Bin\MSExchangeMailboxReplication.exe.config file.

In Exchange 2013 (MBX):

<Exchange Installation Path>\Program Files\Microsoft\Exchange Server\V15\Bin\MSExchangeMailboxReplication.exe.config file.

You can reset the related keys based on your requirements.

Here is a similar thread for your reference.

https://social.technet.microsoft.com/Forums/exchange/en-US/876f7ee7-d4ae-4b81-bfba-7408d76aa139/increase-simultaneous-moverequests-from-exchange-2010-to-exchange-2013?forum=exchangesvrgeneral

Hope this is helpful to you.

Best regards,