У меня проблема с надстройкой Outlook. Таким образом, надстройка публикуется внутри компании ИТ-отделом, и все видят ее в OWA, и она работает так, как и должна.
Теперь для некоторых пользователей, когда они открывают Outlook 2013 Desktop, он отображается серым цветом так: : 
И когда я иду, чтобы управлять надстройкой на owa, я вижу следующее:
Я попытался отключить другие надстройки, чтобы выяснить, не вызывают ли они конфликты, и это не сработало. Вот файл манифеста: я удалил несколько строк, которые связаны с компанией, и изменил URL, но остальные - те же.
<FormSettings>
<!--
<Form xsi:type="ItemRead">
<DesktopSettings>
<SourceLocation DefaultValue="~remoteAppUrl/AppRead/Home/Home.html"/>
<RequestedHeight>250</RequestedHeight>
</DesktopSettings>
</Form>
-->
<Form xsi:type="ItemEdit">
<DesktopSettings>
<SourceLocation DefaultValue="~remoteAppUrl/MailForms/AppCompose/1.0.0.3/Home/Home.html"/>
</DesktopSettings>
</Form>
</FormSettings>
<Permissions>ReadWriteItem</Permissions>
<Rule xsi:type="RuleCollection" Mode="Or">
<Rule xsi:type="ItemIs" ItemType="Message" FormType="Edit" />
<Rule xsi:type="ItemIs" ItemType="Appointment" FormType="Edit" />
<!--
<Rule xsi:type="ItemIs" ItemType="Message" FormType="Read" />
<Rule xsi:type="ItemIs" ItemType="Appointment" FormType="Read" />
-->
</Rule>
<DisableEntityHighlighting>false</DisableEntityHighlighting>
<VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" xsi:type="VersionOverridesV1_0">
<Requirements>
<bt:Sets DefaultMinVersion="1.4">
<bt:Set Name="Mailbox" />
</bt:Sets>
</Requirements>
<DesktopFormFactor>
<!-- Location of the Functions that UI-less buttons can trigger (ExecuteFunction Actions). -->
<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" />
</Action>
</Control>
--><!-- Go to http://aka.ms/ButtonCommands to learn how to add more Controls: ExecuteFunction and Menu --><!--
</Group>
</OfficeTab>
</ExtensionPoint>-->
<!-- Message Compose -->
<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="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="messageComposeTaskPaneUrl" />
</Action>
</Control>
<!-- Go to http://aka.ms/ButtonCommands to learn how to add more Controls: ExecuteFunction and Menu -->
</Group>
</OfficeTab>
</ExtensionPoint>
<!-- Go to http://aka.ms/ExtensionPointsCommands to learn how to add more Extension Points: MessageRead, AppointmentOrganizer, AppointmentAttendee -->
</DesktopFormFactor>
</Host>
</Hosts>
<Resources>
<bt:Images>
<bt:Image id="icon16" DefaultValue="~remoteAppUrl/MailForms/Images/icon16.png"/>
<bt:Image id="icon32" DefaultValue="~remoteAppUrl/MailForms/Images/icon32.png"/>
<bt:Image id="icon80" DefaultValue="~remoteAppUrl/MailForms/Images/icon80.png"/>
</bt:Images>
<bt:Urls>
<bt:Url id="functionFile" DefaultValue=" ~remoteAppUrl/MailForms/Functions/FunctionFile.html"/>
<!--<bt:Url id="messageReadTaskPaneUrl" DefaultValue="~remoteAppUrl/AppRead/Home/Home.html"/>-->
<bt:Url id="messageComposeTaskPaneUrl" DefaultValue="~remoteAppUrl/MailForms/AppCompose/1.0.0.3/Home/Home.html"/>
</bt:Urls>
<bt:ShortStrings>
<bt:String id="groupLabel" DefaultValue="My Add-in Group"/>
<bt:String id="customTabLabel" DefaultValue="My Add-in Tab"/>
<bt:String id="paneReadButtonLabel" DefaultValue="Messageware Mail Forms"/>
<bt:String id="paneReadSuperTipTitle" DefaultValue="Get all properties"/>
</bt:ShortStrings>
<bt:LongStrings>
<bt:String id="paneReadSuperTipDescription" DefaultValue="Opens a pane displaying all available properties. This is an example of a button that opens a task pane."/>
</bt:LongStrings>
</Resources>
</VersionOverrides>
</OfficeApp>
Есть идеи?