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Failing to activate outlook add-in Edited

I have the Trello Outlook add in but I am failing to login to trello. The screen below pops up when I attempt to login.

Trello login - outlook.png


I click login on this screen then the following message appears:


Trello login - outlook - fail.jpg

As a result, I can't add trello to my outlook. Anyone with a solution? Please assist.


Response from Microsoft below:


Yes, we are looking into this issue at the moment. The workaround is the following: 

First use Outlook on the web in another browser other than Internet Explorer using the following instructions:

Then you should be able to follow these instructions to install or use the Trello add-in Once you do so, login to the Trello add-in on Outlook on the web. Afterwards, you should already be logged into the add-in in Outlook desktop. 



1 answer

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Answer accepted
Mike Atlassian Team Oct 22, 2019

Hi Ackson,


The bad news is that Trello didn't develop, and importantly, doesn't maintain, the Outlook add-in—this is a Microsoft product, not a Trello product, and we don't have any ability to manage it or solve a problem like this. The problem is that Trello did deprecate support for Internet Explorer, and while your default browser might not be IE, Outlook is using IE, which won't work. The link we provide on that page is designed to get around that, but Outlook isn't correctly accepting the token to properly work around that. is the best place to reach for support directly about the Outlook add-in, and they'll be able to help!

Thank you, I will contact them

Same error.. That sucks! Everything that is handed to Microsoft turns to merde.

Like Ackson Mapfundematsva likes this
Like Ackson Mapfundematsva likes this

@Mike thanks for the assistance, I finally got a response today 6 December 2019 after over a month. @Helen Aasa @Alf Müller I have updated my question with the response I recieved from Microsoft.

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