Office Add-In for Outlook not sideloading on the app

Question

I have created an custom outlook add in. When I side load it on using the website it works with no issues. When I go into the Outlook app and try to side load, it will install but not show up on the task pane. Is there a reason for this? Thanks!

Answer 1

There are multiple reasons why your add-ins may not be displayed in Office applications/task panes. One of them is the use of http protocol instead of https.

Another point is the privacy control setting in the registry that can be distributed by group policies. Especially the key:

HKEY_CURRENT_USER\Software\Policies\Microsoft\office\16.0\common\privacy -> controllerconnectedservicesenabled

if it is set to dword:00000002 (which is disabled).

You need to change it to dword:00000001 (enabled) and the add-in may immediately appear.The relevant information can be found in the article.

But I'd suggest starting from the Troubleshoot development errors with Office Add-ins article.