OST files when upgrading from Office 2007 to Office 2010
Posted on 2011-03-04
I'm currently testing an upgrade from Office 2007 to Office 2010. When I open Outlook, I receive a prompt; "Outlook is using an old copy of your Outlook data file (.ost). Exit Outlook, delete file and restart Outlook..."
Is it possible to upgrade the existing OST or do anything to avoid doing this?...
I have 64 sites using a remote exchange server in a datacentre with a 10mbps line. All my sites use ost files and would need to download their mailboxes again... I'd like to avoid this.