Issues with Modern Attachments (and Add-Ins) in Outlook for Mac

Hey Ben, thanks for the details. It looks like we are seeing two issues here.

One where you try to use the new attachments feature (or an add in) and Outlook hangs. You force quit.

The other is when you do force quit and restart, your insider fast features are gone, cause you have been put into the production ring. 

We are investigating both, in the mean time, can you please provide the following - 

When you try to add an attachment, outlook hangs, can you gather a hang sample and send it to us please?

1. Try to add an attachment
2. Outlook hangs, let it be
3. Open Activity Monitor
4. Select Microsoft OUtlook in the process name column
5. Click on the gear on the top left, it is a drop down
6. Select Sample Process and please copy the resulting output and send it here as a text file.

Can you also please send a video if possible? We are not able to repro here so seeing exactly what is going on in the screen may help. If you can't because you have sensitive data on display, I totally understand :)

thanks!