Is that the new Microsoft format? Support for that is planned in OpenOffice version 3, afaik. You should ask the creators of the X-formats (x-files? hehe) .docx, .xlsx etc save in an earlier format and send to you.
Unfortunately, it's not that easy. At work we run an application that reads and convertes MS Office documents via OpenOffice.
By the way, telling your clients to upload again in a different format is never an option, especially if the files are generated from automated systems. They will just choose a different provider that doesn't required them to make changes to their existing systems.
I am asking because there is a plugin from Novell that works with other versions of OpenOffice/Linux (Ubuntu and Suse) but we use CentOS/RHEL, so I need to get that version running.
Gabriel
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