Refused to connect in Outlook Web add-in when trying to load any web page url

Question

I am working on Outlook web add-in demo to show my demo add-in option inside the Outlook. So will have a website portal that will work in any browsers.My add-in demo project is running fine and add-in name is appearing in Outlook. Now I need to load same website portal inside the web add-in in the whole web add-in window. I have added the url in manifest file inside the Sourcelocation still is appearing like "Refused to connect" in task pane.

Could anyone assist me to do the same? How can i do that.

I am adding here my manifest, html file and taskpane screenshot.

Answer 1

You need to add your URL to the AppDomain element in your manifest for it to appear in your add-in pane:

The following XML manifest example hosts its main add-in page in the https://www.contoso.com domain as specified in the SourceLocation element. It also specifies the https://www.northwindtraders.com domain in an AppDomain element within the AppDomains element list. If the add-in goes to a page in the www.northwindtraders.com domain, that page opens in the add-in pane, even in Office desktop.

<?xml version="1.0" encoding="UTF-8"?>
<OfficeApp xmlns="http://schemas.microsoft.com/office/appforoffice/1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="TaskPaneApp">
  <!--IMPORTANT! Id must be unique for each add-in. If you copy this manifest ensure that you change this id to your own GUID. -->
  <Id>c6890c26-5bbb-40ed-a321-37f07909a2f0</Id>
  <Version>1.0</Version>
  <ProviderName>Contoso, Ltd</ProviderName>
  <DefaultLocale>en-US</DefaultLocale>
  <DisplayName DefaultValue="Northwind Traders Excel" />
  <Description DefaultValue="Search Northwind Traders data from Excel"/>
  <SupportUrl DefaultValue="[Insert the URL of a page that provides support information for the app]" />
  <AppDomains>
    <AppDomain>https://www.northwindtraders.com</AppDomain>
  </AppDomains>
  <DefaultSettings>
    <SourceLocation DefaultValue="https://www.contoso.com/search_app/Default.aspx" />
  </DefaultSettings>
  <Permissions>ReadWriteDocument</Permissions>
</OfficeApp>

This link should help with more information: https://docs.microsoft.com/en-us/office/dev/add-ins/develop/add-in-manifests?tabs=tabid-1#specify-domains-you-want-to-open-in-the-add-in-window