An upgrade is taking an existing server and installing the newer version of the software on that server. The server installation process then converts the old software to the newest version. You are replacing a server by replacing it with a newer version. Migration is the act of moving data between the two organizations. (McBee, 2010). Migration migrate all mailbox information to the new Exchange mailboxes. Migration allows that two or more separate Exchange organizations can become a single organization. According to McBee, Migration allows movement with your ...view middle of the document...
Migrations needs to be kept in checked because of a lot of details and separate types of information. (McBee, 2010). When you are reusing existing hardware, you may want to use leapfrog migration.
According to McBee, upgrading is an easier process because all you’re doing is moving mailboxes and public folder information. (2010). You would want to choose upgrading for Exchange 5.5 to Exchange 2000 or 2003. With this upgrading, all that you are doing is relocating mailboxes and public folder information.
There are many factors to consider before upgrading and migration are to understand if you have all the prerequisites. You must have x64 compatible hardware with the right processors. Intel Itanium processor is not compatible with Exchange 2010. (McBee, 2010). Because Exchange 2010 relays heavy on Active Directory, one must pay attention to their domain controller and global catalog servers. McBee emphasis that Exchange 2010 requires that all domain controllers run on Windows Server 2003 + SPI. (2010). You must consider what version of Exchange you already have.
McBee and Elfassy. (2010). Mastering Exchange Server 2010. Indianapolis, Indiana, Wiley Publishing, Inc