i have a network which user have their Outlook 2010 archive files growing. in order to compress it fast and avoid to disturb users i have copied their archive files and use on another network a Microsoft office 2013 to "Compress" users archive.pst from Office 2010.
Now, after copied users archive.pst files back to the network with a compressed files, which helped to reduze the size, i try to add those data files back to Outlook 2010 but i get an error message saying (see picture attached) that the "file ...archive.pst is not an Outlook data file (.pst).
I need to add those files back to Office 2010. Can you help me?