Also special care with user-level quotas or limits, lest migrations fail to overcome the defaults, and whether we will move a lot of mailboxes will be careful with LOGS. We will have the forest functional levels and the domain at least 'Windows Server 2003', the schema master must be Windows 2003 SP2 higher, as well as a global catalog in the area with said SO. We must take into account that Exchange 2013 will only be available the following versions of Outlook (Y this patch If public folders are not connected to the Outlooks): Additionally it would be advisable to have the Update Rollup installed post SP3 equally.
To consider: Have updated the Windows Update servers, in addition to at least SP3 on all Exchange 2010, if not, install it first in the CAS, then the HUB and finally mailbox servers if we have separate roles. We consider that it is a long process and especially depending on the number of servers and mailboxes that have or their sizes, it will not require a migration stop service at any time. In this document we can see all the requirements and the steps we must take to proceed to migrate a Microsoft Exchange environment 2010 a Exchange Server 2013.
