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Introducing Office Web App Integration with Outlook Web App in Exchange Online

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The_Exchange_Team
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Oct 31, 2011
On the Exchange team, it’s always important to us to get feedback from our customers on what we’re doing well and what we could be doing to make the experience better for you. In Exchange 2007, in ...
Updated Jul 01, 2019
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Deleted
Nov 05, 2011

Regarding Jeremy's question: "But why can I not edit in Word Web App?"

The Office Web Apps in Exchange are "viewers", as stated in the second paragraph of the post above:

   "...Exchange Online that now integrates the Office Web Apps into the attachment previewing experience..."

Note the phrase "previewing experience".  To edit, you need to either upload the document to your SharePoint Online site and edit it there, or, download and edit in the rich client.