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I'm creating an add-in for Office 365, and my question is for Outlook 365.

When reading your mail, you can make an add-in show a horizontal pane above each email. However, I'm wondering if it would be possible to also show a vertical taskpane on the side in read mode (like the taskpane in edit mode), or if it is possible to add a button the navigation bar near the top:

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(I don't have enough rep to add office-365 as a tag)

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Community
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Ryan Andrews
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2 Answers2

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No. At present, the Office add-in doesn't support the vertical task pane for the Outlook online.

You may leave the feedback from here if you require this feature.

Fei Xue
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While Outlook add-ins don't currently support the vertical task pane in read mode for Outlook on the web, it is available in Desktop Outlook if you use add-in commands and add support for version overrides 1.0 to your manifest.

More information on add-in commands can be found here: https://dev.office.com/docs/add-ins/outlook/add-in-commands-for-outlook

Wamwitha Love
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