...
- Install the packages needed for hosting the add-on (e.g. .NET core SDK and .NET core hosting bundle for hosting the app in the IIS server).
- Whitelisting some URLs accessed by the app:
- https://appsforoffice.microsoft.com/lib/1/hosted/office.js
- https://graph.microsoft.com/v1.0
- https://login.microsoftonline.com
- https://msoutlookappoutlook.azurewebsitesapp4legal.netcom (this link must be whitelisted just in case the app is hosted by our side)
...
