We want ot upgrade our Exchange 2010 server to Exchange 2013. The problem I ma having is that the Exchange 2010 server is running SP2 not SP3. We are having issues with the SP3 upgrade failing. I learned this the hard way mid way through the upgrade after all the checks had passed but the installer quit mid way due to not having the correct permissions on an OWA folder. By that time the old installation had already been removed and the installer would not move forward. My Exchange server was dead in the water and I had to use our backups to restore the entire VM.
So now I'm very hesitant to try this again. What are my options for an upgrade to Exchange 2013? Is it possible instead of going through the official migration process (which requires 2010 to be at SP3) to just spin up a new instance of 2013 and do an export of the mailboxes (PST) on the 2010 machine and import them onto the 2013 box? What are the limitations or potential gotchas going this route.