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I’ve connected my Gmail account to Outlook for Mac and tried to get window.Office.context.mailbox.ewsUrl, it returns an empty string ''. I tried to log into my Gmail account using OWA and there it works, it returns

Expected Behavior

Outlook for Mac to be consistent with OWA and return ewsUrl when accessing window.Office.context.mailbox.ewsUrl.

Current Behavior

window.Office.context.mailbox.ewsUrl is an empty string '' in Outlook for Mac when using Gmail account.

Steps to Reproduce, or Live Example

  1. Add your Gmail account to Outlook for Mac, run add-in in taskpane. Check window.Office.context.mailbox.ewsUrl. It will be an empty string ''.
  2. Add your Gmail account to OWA (, run add-in in a taskpane. Check window.Office.context.mailbox.ewsUrl. It should be something like


We can’t access attachments via EWS API, since there’s no ewsUrl.

Your Environment

  • Platform: Mac
  • Host: Outlook
  • Office version number: Outlook for Mac, version 16.40 (20081201)
  • Operating System: macOS Catalina 10.15.6
  • Browser: Chrome 85.0.4183.83 (it works in this browser in OWA)

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