HI there,
I am a server administrator with 10 years extensive experience. I would be happy to help.
Here are my steps for my upgrade from Exchange 2010 to 2013
1. install new server with Windows Server 2012 and Exchange Server 2013
2. move all users to new server
3. migrate public folders to new public folder mailboxes
4. uninstall Exchange 2010
Please message me on the chat to discuss in detail.
Best,
Muquim