I am using outlook 2003 heavily and couple add-in installed as well. Since
2007 is out there, I wonder if upgrading is necessary, is there any major
change and additional useful feature in the new version?

Will there be any problem just upgrading outlook 2003 (part of office 2003)
to retail version of outlook 2007?
I'll appreciate anybody here who had already used outlook 2007 and would
like to share your outlook 2007 experience.

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Canixs,
http://www.canixs.com