Network failed in Outlook desktop event-based activation

Asked Apr 10 '23 at 10:12

Active Apr 10 '23 at 12:57

Viewed 57 times

I had configured my Outlook add-in as event-based activation as per this document https://learn.microsoft.com/en-us/office/dev/add-ins/outlook/autolaunch?tabs=xmlmanifest. Everything is working fine but when I'm trying to make an API call at that time it's showing me Network Request Failed. I have attached the image of the error.

Can anyone guide me on this how to solve this error?

edited Apr 10 '23 at 12:57

Eugene Astafiev

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asked Apr 10 '23 at 10:12

Shiv Yadav

Does your fetch call work from any other event handler? – Eugene Astafiev Apr 10 '23 at 12:57
Make sure that you are not dealing with CORS, see https://stackoverflow.com/questions/75168257/unblock-cors-in-the-embedded-browser-of-excel-for-windows – Eugene Astafiev Apr 10 '23 at 13:02
Fetch is working fine in online outlook but not in desktop. – Shiv Yadav Apr 11 '23 at 04:22
In other event handler there is same issue. – Shiv Yadav Apr 11 '23 at 04:22
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See [Addressing same-origin policy limitations in Office Add-ins](https://learn.microsoft.com/en-us/office/dev/add-ins/develop/addressing-same-origin-policy-limitations) – Eugene Astafiev Apr 11 '23 at 16:35
Get api is working fine. As per this document i had tried with the post request https://learn.microsoft.com/en-us/office/dev/add-ins/outlook/autolaunch?tabs=xmlmanifest#request-external-data but still there is issue. – Shiv Yadav Apr 12 '23 at 13:40
See https://stackoverflow.com/help/minimal-reproducible-example – FreeSoftwareServers Apr 14 '23 at 20:03
@YadavShiv, can you try with XMLHttpRequest to get a more detailed error message? – Outlook Add-ins Team - MSFT May 01 '23 at 16:58
Thanks for the solution. I had solve this using XMLHttpRequest. – Shiv Yadav May 02 '23 at 04:44
@OutlookAdd-insTeam-MSFT can you please give any solution for the below issue https://stackoverflow.com/questions/76139965/event-based-activation-not-working-in-desktop-window/76142932#76142932 – Shiv Yadav May 02 '23 at 04:45
@YadavShiv, I will take a look at the issue you linked. Glad XHR solved your problem here. – Outlook Add-ins Team - MSFT May 04 '23 at 17:01

Network failed in Outlook desktop event-based activation

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