Outlook add-in pinnable task pane - outlook

Question

I am developing an Outlook add-in. Everything was working fine until i tried to add support for pinnable task pane. I've read that I have to add the Versionoverrides child for v1.1. However, if I add the v1.1 VersionOverrides, my add-in won't show at all.
Here's my manifest
<?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"
xmlns:bt="http://schemas.microsoft.com/office/officeappbasictypes/1.0"
xmlns:mailappor="http://schemas.microsoft.com/office/mailappversionoverrides"
xsi:type="MailApp">
<Id>fc188889-7206-4d15-9968-7a4966f7f4ca</Id>
<Version>1.0.0.2</Version>
<ProviderName>Microsoft Outlook Dev Center</ProviderName>
<DefaultLocale>en-US</DefaultLocale>
<DisplayName DefaultValue="SolpheoPluginWeb" />
<Description DefaultValue="SolpheoPluginWeb Description"/>
<IconUrl DefaultValue="~remoteAppUrl/Images/blue-64.png" />
<Hosts>
<Host Name="Mailbox" />
</Hosts>
<Requirements>
<Sets>
<Set Name="MailBox" MinVersion="1.1" />
</Sets>
</Requirements>
<FormSettings>
<Form xsi:type="ItemRead">
<DesktopSettings>
<SourceLocation DefaultValue="~remoteAppUrl/"/>
<RequestedHeight>450</RequestedHeight>
</DesktopSettings>
</Form>
<Form xsi:type="ItemEdit">
<DesktopSettings>
<SourceLocation DefaultValue="~remoteAppUrl/"/>
</DesktopSettings>
</Form>
</FormSettings>
<Permissions>ReadWriteMailbox</Permissions>
<Rule xsi:type="RuleCollection" Mode="Or">
<Rule xsi:type="ItemHasAttachment"/>
</Rule >
<DisableEntityHighlighting>false</DisableEntityHighlighting>
<VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" xsi:type="VersionOverridesV1_0">
<Description resid="residAppDescription" />
<Requirements>
<bt:Sets DefaultMinVersion="1.1">
<bt:Set Name="Mailbox" />
</bt:Sets>
</Requirements>
<Hosts>
<Host xsi:type="MailHost">
<DesktopFormFactor>
<FunctionFile resid="functionFile" />
<!-- Message read form -->
<ExtensionPoint xsi:type="MessageReadCommandSurface">
<OfficeTab id="TabDefault">
<Group id="msgReadDemoGroup">
<Label resid="groupLabel" />
<Control xsi:type="Button" id="msgReadSaveAttachments">
<Label resid="saveAllAttachmentsLabel" />
<Supertip>
<Title resid="saveAllAttachmentsTitle" />
<Description resid="saveAllAttachmentsDesc" />
</Supertip>
<Icon>
<bt:Image size="16" resid="save-all-icon16" />
<bt:Image size="32" resid="save-all-icon32" />
<bt:Image size="80" resid="save-all-icon80" />
</Icon>
<Action xsi:type="ExecuteFunction">
<FunctionName>UploadAllAttachments</FunctionName>
</Action>
</Control>
<!-- Task pane button -->
<Control xsi:type="Button" id="msgReadOpenPaneButton">
<Label resid="paneReadButtonLabel" />
<Supertip>
<Title resid="paneReadSuperTipTitle" />
<Description resid="paneReadSuperTipDescription" />
</Supertip>
<Icon>
<bt:Image size="16" resid="green-icon-16" />
<bt:Image size="32" resid="green-icon-32" />
<bt:Image size="80" resid="green-icon-80" />
</Icon>
<Action xsi:type="ShowTaskpane">
<SourceLocation resid="readTaskPaneUrl" />
</Action>
</Control>
</Group>
</OfficeTab>
</ExtensionPoint>
</DesktopFormFactor>
</Host>
</Hosts>
<Resources>
<bt:Images>
<bt:Image id="save-all-icon16" DefaultValue="~remoteAppUrl/Images/save-all-16.png"/>
<bt:Image id="save-all-icon32" DefaultValue="~remoteAppUrl/Images/save-all-32.png"/>
<bt:Image id="save-all-icon64" DefaultValue="~remoteAppUrl/Images/save-all-64.png"/>
<bt:Image id="save-all-icon80" DefaultValue="~remoteAppUrl/Images/save-all-80.png"/>
<!-- Blue icon -->
<bt:Image id="blue-icon-16" DefaultValue="~remoteAppUrl/Images/blue-16.png"/>
<bt:Image id="blue-icon-32" DefaultValue="~remoteAppUrl/Images/blue-32.png"/>
<bt:Image id="blue-icon-80" DefaultValue="~remoteAppUrl/Images/blue-80.png"/>
<!-- Red icon -->
<bt:Image id="red-icon-16" DefaultValue="~remoteAppUrl/Images/red-16.png"/>
<bt:Image id="red-icon-32" DefaultValue="~remoteAppUrl/Images/red-32.png"/>
<bt:Image id="red-icon-80" DefaultValue="~remoteAppUrl/Images/red-80.png"/>
<!-- Green icon -->
<bt:Image id="green-icon-16" DefaultValue="~remoteAppUrl/Images/green-16.png"/>
<bt:Image id="green-icon-32" DefaultValue="~remoteAppUrl/Images/green-32.png"/>
<bt:Image id="green-icon-80" DefaultValue="~remoteAppUrl/Images/green-80.png"/>
</bt:Images>
<bt:Urls>
<bt:Url id="residExtensionPointUrl" DefaultValue="~remoteAppUrl/"/>
<bt:Url id="functionFile" DefaultValue="~remoteAppUrl/#!/functions"/>
<bt:Url id="readTaskPaneUrl" DefaultValue="~remoteAppUrl/"/>
</bt:Urls>
<bt:ShortStrings>
<bt:String id="groupLabel" DefaultValue="Add-in Demo"/>
<bt:String id="saveAllAttachmentsLabel" DefaultValue="Save all attachments"/>
<bt:String id="saveAllAttachmentsTitle" DefaultValue="Save all attachments"/>
<!-- Read mode -->
<bt:String id="funcReadButtonLabel" DefaultValue="Get subject"/>
<bt:String id="menuReadButtonLabel" DefaultValue="Get property"/>
<bt:String id="paneReadButtonLabel" DefaultValue="Display all properties"/>
<bt:String id="funcReadSuperTipTitle" DefaultValue="Gets the subject of the message or appointment"/>
<bt:String id="menuReadSuperTipTitle" DefaultValue="Choose a property to get"/>
<bt:String id="paneReadSuperTipTitle" DefaultValue="Get all properties"/>
<bt:String id="menuItem1ReadLabel" DefaultValue="Get item class"/>
<bt:String id="menuItem2ReadLabel" DefaultValue="Get date time created"/>
<bt:String id="menuItem3ReadLabel" DefaultValue="Get item ID"/>
</bt:ShortStrings>
<bt:LongStrings>
<bt:String id="saveAllAttachmentsDesc" DefaultValue="Saves all attachments to the Outlook Attachments folder in your OneDrive. This will overwrite any files that already exist with the same name."/>
<bt:String id="paneReadSuperTipDescription" DefaultValue="Opens a pane so you can choose which attachments to save."/>
<!-- Read mode -->
<bt:String id="funcReadSuperTipDescription" DefaultValue="Gets the subject of the message or appointment and displays it in the info bar. This is an example of a function button."/>
<bt:String id="menuReadSuperTipDescription" DefaultValue="Gets the selected property of the message or appointment and displays it in the info bar. This is an example of a drop-down menu button."/>
<bt:String id="paneReadSuperTipDescription" DefaultValue="Opens a pane displaying all available properties of the message or appointment. This is an example of a button that opens a task pane."/>
<bt:String id="menuItem1ReadTip" DefaultValue="Gets the item class of the message or appointment and displays it in the info bar." />
<bt:String id="menuItem2ReadTip" DefaultValue="Gets the date and time the message or appointment was created and displays it in the info bar." />
<bt:String id="menuItem3ReadTip" DefaultValue="Gets the item ID of the message or appointment and displays it in the info bar." />
</bt:LongStrings>
</Resources>
<VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides/1.1" xsi:type="VersionOverridesV1_1">
<Requirements>
<bt:Sets DefaultMinVersion="1.1">
<bt:Set Name="Mailbox" />
</bt:Sets>
</Requirements>
<Hosts>
<Host xsi:type="MailHost">
<DesktopFormFactor>
<FunctionFile resid="functionFile" />
<!-- Message read form -->
<ExtensionPoint xsi:type="MessageReadCommandSurface">
<OfficeTab id="TabDefault">
<Group id="msgReadDemoGroup">
<Label resid="groupLabel" />
<Control xsi:type="Button" id="msgReadSaveAttachments">
<Label resid="saveAllAttachmentsLabel" />
<Supertip>
<Title resid="saveAllAttachmentsTitle" />
<Description resid="saveAllAttachmentsDesc" />
</Supertip>
<Icon>
<bt:Image size="16" resid="save-all-icon16" />
<bt:Image size="32" resid="save-all-icon32" />
<bt:Image size="80" resid="save-all-icon80" />
</Icon>
<Action xsi:type="ExecuteFunction">
<FunctionName>UploadAllAttachments</FunctionName>
</Action>
</Control>
<!-- Task pane button -->
<Control xsi:type="Button" id="msgReadOpenPaneButton">
<Label resid="paneReadButtonLabel" />
<Supertip>
<Title resid="paneReadSuperTipTitle" />
<Description resid="paneReadSuperTipDescription" />
</Supertip>
<Icon>
<bt:Image size="16" resid="green-icon-16" />
<bt:Image size="32" resid="green-icon-32" />
<bt:Image size="80" resid="green-icon-80" />
</Icon>
<Action xsi:type="ShowTaskpane">
<SourceLocation resid="readTaskPaneUrl" />
<SupportsPinning>true</SupportsPinning>
</Action>
</Control>
</Group>
</OfficeTab>
</ExtensionPoint>
</DesktopFormFactor>
</Host>
</Hosts>
<Resources>
<bt:Images>
<bt:Image id="save-all-icon16" DefaultValue="~remoteAppUrl/Images/save-all-16.png"/>
<bt:Image id="save-all-icon32" DefaultValue="~remoteAppUrl/Images/save-all-32.png"/>
<bt:Image id="save-all-icon64" DefaultValue="~remoteAppUrl/Images/save-all-64.png"/>
<bt:Image id="save-all-icon80" DefaultValue="~remoteAppUrl/Images/save-all-80.png"/>
<!-- Blue icon -->
<bt:Image id="blue-icon-16" DefaultValue="~remoteAppUrl/Images/blue-16.png"/>
<bt:Image id="blue-icon-32" DefaultValue="~remoteAppUrl/Images/blue-32.png"/>
<bt:Image id="blue-icon-80" DefaultValue="~remoteAppUrl/Images/blue-80.png"/>
<!-- Red icon -->
<bt:Image id="red-icon-16" DefaultValue="~remoteAppUrl/Images/red-16.png"/>
<bt:Image id="red-icon-32" DefaultValue="~remoteAppUrl/Images/red-32.png"/>
<bt:Image id="red-icon-80" DefaultValue="~remoteAppUrl/Images/red-80.png"/>
<!-- Green icon -->
<bt:Image id="green-icon-16" DefaultValue="~remoteAppUrl/Images/green-16.png"/>
<bt:Image id="green-icon-32" DefaultValue="~remoteAppUrl/Images/green-32.png"/>
<bt:Image id="green-icon-80" DefaultValue="~remoteAppUrl/Images/green-80.png"/>
</bt:Images>
<bt:Urls>
<bt:Url id="residExtensionPointUrl" DefaultValue="~remoteAppUrl/"/>
<bt:Url id="functionFile" DefaultValue="~remoteAppUrl/#!/functions"/>
<bt:Url id="readTaskPaneUrl" DefaultValue="~remoteAppUrl/"/>
</bt:Urls>
<bt:ShortStrings>
<bt:String id="groupLabel" DefaultValue="Add-in Demo"/>
<bt:String id="saveAllAttachmentsLabel" DefaultValue="Save all attachments"/>
<bt:String id="saveAllAttachmentsTitle" DefaultValue="Save all attachments"/>
<!-- Read mode -->
<bt:String id="funcReadButtonLabel" DefaultValue="Get subject"/>
<bt:String id="menuReadButtonLabel" DefaultValue="Get property"/>
<bt:String id="paneReadButtonLabel" DefaultValue="Display all properties"/>
<bt:String id="funcReadSuperTipTitle" DefaultValue="Gets the subject of the message or appointment"/>
<bt:String id="menuReadSuperTipTitle" DefaultValue="Choose a property to get"/>
<bt:String id="paneReadSuperTipTitle" DefaultValue="Get all properties"/>
<bt:String id="menuItem1ReadLabel" DefaultValue="Get item class"/>
<bt:String id="menuItem2ReadLabel" DefaultValue="Get date time created"/>
<bt:String id="menuItem3ReadLabel" DefaultValue="Get item ID"/>
</bt:ShortStrings>
<bt:LongStrings>
<bt:String id="saveAllAttachmentsDesc" DefaultValue="Saves all attachments to the Outlook Attachments folder in your OneDrive. This will overwrite any files that already exist with the same name."/>
<bt:String id="paneReadSuperTipDescription" DefaultValue="Opens a pane so you can choose which attachments to save."/>
<!-- Read mode -->
<bt:String id="funcReadSuperTipDescription" DefaultValue="Gets the subject of the message or appointment and displays it in the info bar. This is an example of a function button."/>
<bt:String id="menuReadSuperTipDescription" DefaultValue="Gets the selected property of the message or appointment and displays it in the info bar. This is an example of a drop-down menu button."/>
<bt:String id="paneReadSuperTipDescription" DefaultValue="Opens a pane displaying all available properties of the message or appointment. This is an example of a button that opens a task pane."/>
<bt:String id="menuItem1ReadTip" DefaultValue="Gets the item class of the message or appointment and displays it in the info bar." />
<bt:String id="menuItem2ReadTip" DefaultValue="Gets the date and time the message or appointment was created and displays it in the info bar." />
<bt:String id="menuItem3ReadTip" DefaultValue="Gets the item ID of the message or appointment and displays it in the info bar." />
</bt:LongStrings>
</Resources>
</VersionOverrides>
</VersionOverrides>
</OfficeApp>
I am developing in Visual Studio and I am using Outlook 2016.
If I remove the whole VersionOverrides_V1.1, everything works fine

Answer 1

Inside your manifest's <bt:LongStrings> section you have included <bt:String> with the same id twice. You need to remove items with duplicated ids. Please remove the following ...
<bt:String id="paneReadSuperTipDescription" DefaultValue="Opens a pane displaying all available properties of the message or appointment."/>