Quote:
Originally Posted by jeschulze  And most importantly, It will not import a sheet from Excel, and recreation of these things is something my team is not quite willing to do yet. |
The network edition includes convertd, there's an import button in the toolbar that can handle .xls files (and though it doesn't specifically state so it can handle .xlsx on newer ZCS versions):
(zimbraFeatureViewInHtmlEnabled has to be set to TRUE on COS or user)
There's all sorts of plans in
bugzilla 
-Stuff on exporting, opening files from the briefcase in documents, to the one you've mentioned
Bug 28433 - Real time collaboration (multi-user editing) for documents