Problem with Teams meeting Add-Ins in Outlook 2016

Question

In my organization we have a problem with the complement to generate Microsoft Teams meetings in Outlook. The problem is that when using the plugin to generate a meeting, it displays the following message:

"We couldn´t schedule the meeting. Please try again later".

In my organization we use a proxy server to navigate, I have noticed that if I deactivate the proxy the add-in works correctly.
Anyone had this problem?

erik365online · Answer

Hi&nbsp;jona_46,did you configure exceptions for your proxy?Clients need to be able to access some Office 365 URL's and IP address ranges to work properly.&nbsp;https://docs.microsoft.com/en-us/office365/enterprise/urls-and-ip-address-rangeshttps://docs.microsoft.com/en-us/office365/enterprise/office-365-ip-web-service&nbsp;&nbsp;

mark_wildman · Answer

We found that the outlook teams addin doesn't support proxy authentication. Also reported here:
https://microsoftteams.uservoice.com/forums/908686-bug-reports/suggestions/41041942-outlook-add-in-does-not-support-proxy-authenticati

The addin would work fine on a machine without a proxy turned on.
We had to set a bypass for:
https://api.scheduler.teams.microsoft.com/
https://mobile.pipe.aria.microsoft.com/

to stop getting http 407's

We had to set a bypass on our proxy for this to work

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Problem with Teams meeting Add-Ins in Outlook 2016

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