我在outlook web addin中使用功能区按钮打开任务窗格。它在网络上的视觉效果很好。但在outlook outlook桌面（2016）功能区按钮在电子邮件的资源管理器视图中显示为灰色（禁用）。See here。但是当打开电子邮件按钮时启用。我正在使用Outlook 64位。
这是我正在使用的清单文件。
<?xml version="1.0" encoding="UTF-8"?>
<!--Created:ce44715c-8c4e-446b-879c-ea9ebe0f09c8-->
<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/1.0"
xsi:type="MailApp">
<!-- Begin Basic Settings: Add-in metadata, used for all versions of Office unless override provided. -->
<!-- IMPORTANT! Id must be unique for your add-in, if you reuse this manifest ensure that you change this id to a new GUID. -->
<Id>aeeb9a41-c591-4718-88e0-9ab3f4ec3eb9</Id>
<!--Version. Updates from the store only get triggered if there is a version change. -->
<Version>1.0.0.0</Version>
<ProviderName>Davton</ProviderName>
<DefaultLocale>en-US</DefaultLocale>
<!-- The display name of your add-in. Used on the store and various places of the Office UI such as the add-ins dialog. -->
<DisplayName DefaultValue="Notify To Team" />
<Description DefaultValue="Notify To Team"/>
<IconUrl DefaultValue="https://localhost:44300/Images/dvt-80.png"/>
<HighResolutionIconUrl DefaultValue="https://localhost:44300/images/dvt-80.png" />
<SupportUrl DefaultValue="http://www.contoso.com" />
<!-- Domains that will be allowed when navigating. For example, if you use ShowTaskpane and then have an href link, navigation will only be allowed if the domain is on this list. -->
<AppDomains>
<AppDomain>AppDomain1</AppDomain>
<AppDomain>AppDomain2</AppDomain>
<AppDomain>AppDomain3</AppDomain>
</AppDomains>
<!--End Basic Settings. -->
<Hosts>
<Host Name="Mailbox" />
</Hosts>
<Requirements>
<Sets>
<Set Name="Mailbox" MinVersion="1.1" />
</Sets>
</Requirements>
<FormSettings>
<Form xsi:type="ItemRead">
<DesktopSettings>
<SourceLocation DefaultValue="https://localhost:44300/MessageRead.html"/>
<RequestedHeight>250</RequestedHeight>
</DesktopSettings>
</Form>
</FormSettings>
<Permissions>ReadWriteItem</Permissions>
<Rule xsi:type="RuleCollection" Mode="Or">
<Rule xsi:type="ItemIs" ItemType="Message" FormType="Read" />
</Rule>
<DisableEntityHighlighting>false</DisableEntityHighlighting>
<VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" xsi:type="VersionOverridesV1_0">
<Requirements>
<bt:Sets DefaultMinVersion="1.3">
<bt:Set Name="Mailbox"/>
</bt:Sets>
</Requirements>
<Hosts>
<Host xsi:type="MailHost">
<DesktopFormFactor>
<FunctionFile resid="functionFile"/>
<!-- Message Read -->
<!-- Message Read -->
<ExtensionPoint xsi:type="MessageReadCommandSurface">
<!-- 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="msgReadGroup">
<Label resid="groupLabel" />
<!-- Launch the add-in : 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="icon16" />
<bt:Image size="32" resid="icon32" />
<bt:Image size="80" resid="icon80" />
</Icon>
<Action xsi:type="ShowTaskpane">
<SourceLocation resid="messageReadTaskPaneUrl" />
</Action>
</Control>
<!-- Go to http://aka.ms/ButtonCommands to learn how to add more Controls: ExecuteFunction and Menu -->
</Group>
</OfficeTab>
</ExtensionPoint>
</DesktopFormFactor>
</Host>
</Hosts>
<Resources>
<bt:Images>
<bt:Image id="icon16" DefaultValue="https://localhost:44300/Images/dvt-16.png"/>
<bt:Image id="icon32" DefaultValue="https://localhost:44300/Images/dvt-32.png"/>
<bt:Image id="icon80" DefaultValue="https://localhost:44300/Images/dvt-80.png"/>
</bt:Images>
<bt:Urls>
<bt:Url id="functionFile" DefaultValue="https://localhost:44300/Functions/FunctionFile.html"/>
<bt:Url id="messageReadTaskPaneUrl" DefaultValue="https://localhost:44300/MessageRead.html"/>
</bt:Urls>
<bt:ShortStrings>
<bt:String id="groupLabel" DefaultValue="Connector"/>
<bt:String id="customTabLabel" DefaultValue="Notify to Team"/>
<bt:String id="paneReadButtonLabel" DefaultValue="Notify to Team"/>
<bt:String id="paneReadSuperTipTitle" DefaultValue="Notify to Team"/>
</bt:ShortStrings>
<bt:LongStrings>
<bt:String id="paneReadSuperTipDescription" DefaultValue="Opens a pane and select a dropdown channel to notify and notify"/>
</bt:LongStrings>
</Resources>
<VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides/1.1" xsi:type="VersionOverridesV1_1">
<Requirements>
<bt:Sets DefaultMinVersion="1.3">
<bt:Set Name="Mailbox"/>
</bt:Sets>
</Requirements>
<Hosts>
<Host xsi:type="MailHost">
<DesktopFormFactor>
<FunctionFile resid="functionFile"/>
<!-- Message Read -->
<ExtensionPoint xsi:type="MessageReadCommandSurface">
<!-- 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="msgReadGroup">
<Label resid="groupLabel" />
<!-- Launch the add-in : 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="icon16" />
<bt:Image size="32" resid="icon32" />
<bt:Image size="80" resid="icon80" />
</Icon>
<Action xsi:type="ShowTaskpane">
<SourceLocation resid="messageReadTaskPaneUrl" />
<SupportsPinning>true</SupportsPinning>
</Action>
</Control>
<!-- Go to http://aka.ms/ButtonCommands to learn how to add more Controls: ExecuteFunction and Menu -->
</Group>
</OfficeTab>
</ExtensionPoint>
</DesktopFormFactor>
</Host>
</Hosts>
<Resources>
<bt:Images>
<bt:Image id="icon16" DefaultValue="https://localhost:44300/Images/dvt-16.png"/>
<bt:Image id="icon32" DefaultValue="https://localhost:44300/Images/dvt-32.png"/>
<bt:Image id="icon80" DefaultValue="https://localhost:44300Images/dvt-80.png"/>
</bt:Images>
<bt:Urls>
<bt:Url id="functionFile" DefaultValue="https://localhost:44300/Functions/FunctionFile.html"/>
<bt:Url id="messageReadTaskPaneUrl" DefaultValue="https://localhost:44300/MessageRead.html"/>
</bt:Urls>
<bt:ShortStrings>
<bt:String id="groupLabel" DefaultValue="Connector"/>
<bt:String id="customTabLabel" DefaultValue="Connector"/>
<bt:String id="paneReadButtonLabel" DefaultValue="Notify to Team"/>
<bt:String id="paneReadSuperTipTitle" DefaultValue="Notify to Team"/>
</bt:ShortStrings>
<bt:LongStrings>
<bt:String id="paneReadSuperTipDescription" DefaultValue="Opens a pane and select a dropdown channel to notify and notify"/>
</bt:LongStrings>
</Resources>
</VersionOverrides>
</VersionOverrides>
</OfficeApp>
任何人都可以帮我在Outlook中的资源管理器视图中启用功能区按钮。
答案 0 :(得分：3)
您的清单文件存在问题。更改以下内容：
<bt:Image id="icon80" DefaultValue="https://localhost:44300Images/dvt-80.png"/>
为：
<bt:Image id="icon80" DefaultValue="https://localhost:44300/Images/dvt-80.png"/>