This is an invalid xsi:type DetectedEntity in outlook add-in

Question

I am trying to detect a pattern when a message is read in an outlook mail (web and desktop), so I decided to add the DetectedEntity extension point but I keep getting the following error on the web and it is not also working on desktop office 2016.

This app can't be installed. The manifest file doesn't conform to the schema definition. This is an invalid xsi:type 'http://schemas.microsoft.com/office/mailappversionoverrides:DetectedEntity'... This is an invalid xsi:type 'http://schemas.microsoft.com/office/mailappversionoverrides:DetectedEntity'.

MANIFEST

  <!-- Message Read -->
  <ExtensionPoint xsi:type="MessageComposeCommandSurface">
    <!-- Use the default tab of the ExtensionPoint or create your own with <CustomTab id="myTab"> -->
    <OfficeTab id="TabDefault">
      <!-- Up to 6 Groups added per Tab -->
      <Group id="msgComposeCmdGroup">
        <Label resid="GroupLabel" />
        <!-- Launch the add-in : task pane button -->
        <Control xsi:type="Button" id="msgReadOpenPaneButton">
          <Label resid="TaskpaneButton.Label" />
          <Supertip>
            <Title resid="TaskpaneButton.Label" />
            <Description resid="TaskpaneButton.Tooltip" />
          </Supertip>
          <Icon>
            <bt:Image size="16" resid="Icon.16x16" />
            <bt:Image size="32" resid="Icon.32x32" />
            <bt:Image size="80" resid="Icon.80x80" />
          </Icon>
          <Action xsi:type="ShowTaskpane">
            <SourceLocation resid="Taskpane.Url" />
          </Action>
        </Control>
        <!-- Go to http://aka.ms/ButtonCommands to learn how to add more Controls: ExecuteFunction and Menu -->
      </Group>
    </OfficeTab>
  </ExtensionPoint>
  <ExtensionPoint xsi:type="DetectedEntity">
    <Label resid="residLabelName"/>
    <!--If you opt to include RequestedHeight, it must be between 140px to 450px, inclusive.-->
    <!--<RequestedHeight>360</RequestedHeight>-->
    <SourceLocation resid="Taskpane.Url" />
    <Rule xsi:type="RuleCollection" Mode="And">
      <Rule xsi:type="ItemIs" ItemType="Message" />
      <Rule xsi:type="ItemHasKnownEntity" EntityType="MeetingSuggestion" Highlight="all" />
      <Rule xsi:type="ItemHasKnownEntity" EntityType="Address" Highlight="none" />
    </Rule>
  </ExtensionPoint>

  <!-- Go to http://aka.ms/ExtensionPointsCommands to learn how to add more Extension Points: MessageRead, AppointmentOrganizer, AppointmentAttendee -->
</DesktopFormFactor>

How do I fix the Issue> I need a way to implement this feature.

Answer 1

DetectedEntities is only supported from VersionOverrides V1_1, if you are using V1_0 this error will be thrown.

The containing VersionOverrides element must have xsi:type attribute value as VersionOverridesV1_1.