User121216299 posted
Hi MSDN_Geek ,I can see that you are trying to display web page in Outlook.
It is possible that Outlook does not work exactly as any other Web Browser application.
And because of that reason you are getting this issue.
You can also try to post the issue in
MSDN Outlook forum.
Outlook Community members can suggest you any work around for this issue.
You had mentioned that,"In the Outlook we can display a webpage by Addin a folder and configuring a http URL to display in the main Outlook window."
I am not sure about the exact steps to do the same. I suggest you to provide the detailed steps .
We will try to make a test on our side to check the result.
Another work around can be to develop a VSTO task pane add in and you can add web browser control to display the web page inside task pane in Outlook. Which can help you to solve the issue.
The easiest solution is to add a DIV in your web page and make it hidden.
When you need to take additional information from user then you just need to make visible that DIV and take the information and again hide it. You can do this via JavaScript.
If the issue is related with UAC then I suggest you to avoid using pop up in your web page and try to collect the information using same web page may help you to solve the issue.
Regards
Deepak