I've made an add-in for Outlook. It adds two command buttons to the ribbon which, when clicked open a task pane with a specific URL. This works fine in the desktop version of Outlook but I don't know how and if I can get this to work in the online version of Outlook. The MS documentation implies OWA supports add-ins but there are no explicit examples (manifests) I can find. When I go to outlook.office.com, click the options button and click "manage add-ins", the add-in is listed under "My add-ins", but there is only an "uninstall" button and no on/off toggle like I have with, for instance, the GIPHY add-in.
Am I missing something in my Manifest? (included below for completeness sake)
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<OfficeApp xmlns="http://schemas.microsoft.com/office/appforoffice/1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="MailApp" xmlns:bt="http://schemas.microsoft.com/office/officeappbasictypes/1.0">
<Id>1e38cb9a-2367-47b9-96b5-8b054dfdd293</Id>
<Version>1.0.0.0</Version>
<ProviderName>ProviderName</ProviderName>
<DefaultLocale>en-US</DefaultLocale>
<DisplayName DefaultValue="DisplayName"/>
<Description DefaultValue="Description"/>
<HighResolutionIconUrl DefaultValue="https://localhost:10084/officeAddIn/icon128.png"/>
<SupportUrl DefaultValue="http://www.something.com" />
<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:10084/officeAddIn/app/home.html"/>
<RequestedHeight>250</RequestedHeight>
</DesktopSettings>
</Form>
</FormSettings>
<Permissions>ReadItem</Permissions>
<Rule xsi:type="RuleCollection" Mode="Or">
<Rule xsi:type="ItemIs" ItemType="Message" FormType="Read"/>
<Rule xsi:type="ItemIs" ItemType="Message" FormType="Edit"/>
</Rule>
<VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" xsi:type="VersionOverridesV1_0">
<Hosts>
<Host xsi:type="MailHost">
<DesktopFormFactor>
<ExtensionPoint xsi:type="MessageReadCommandSurface">
<OfficeTab id="TabDefault">
<Group id="gv.store">
<Label resid="gv.label.store" />
<Control xsi:type="Button" id="gv.newasebtn">
<Label resid="gv.label.newcase" />
<Supertip>
<Title resid="gv.label.newcase" />
<Description resid="gv.descr.newcase" />
</Supertip>
<Icon>
<bt:Image size="16" resid="gv.icon.16" />
<bt:Image size="32" resid="gv.icon.32" />
<bt:Image size="80" resid="gv.icon.80" />
</Icon>
<Action xsi:type="ShowTaskpane">
<SourceLocation resid="gv.url.new_case" />
</Action>
</Control>
<Control xsi:type="Button" id="gv.existingcasebtn">
<Label resid="gv.label.existingcase" />
<Supertip>
<Title resid="gv.label.existingcase" />
<Description resid="gv.descr.existingcase" />
</Supertip>
<Icon>
<bt:Image size="16" resid="gv.icon.16" />
<bt:Image size="32" resid="gv.icon.32" />
<bt:Image size="80" resid="gv.icon.80" />
</Icon>
<Action xsi:type="ShowTaskpane">
<SourceLocation resid="gv.url.existing_case" />
</Action>
</Control>
</Group>
</OfficeTab>
</ExtensionPoint>
</DesktopFormFactor>
</Host>
</Hosts>
<Resources>
<bt:Images>
<bt:Image id="gv.icon.16" DefaultValue="https://localhost:10084/officeAddIn/icon16.png" />
<bt:Image id="gv.icon.32" DefaultValue="https://localhost:10084/officeAddIn/icon32.png" />
<bt:Image id="gv.icon.80" DefaultValue="https://localhost:10084/officeAddIn/icon80.png" />
</bt:Images>
<bt:Urls>
<bt:Url id="gv.url.home" DefaultValue="https://localhost:10084/officeAddIn/app/home.html?gvhost=outlook" />
<bt:Url id="gv.url.new_case" DefaultValue="https://localhost:10084/officeAddIn/app/new_case.html?gvhost=outlook" />
<bt:Url id="gv.url.existing_case" DefaultValue="https://localhost:10084/officeAddIn/app/existing_case.html?gvhost=outlook" />
</bt:Urls>
<bt:ShortStrings>
<bt:String id="gv.label.store" DefaultValue="Opslaan in" />
<bt:String id="gv.label.home" DefaultValue="Home" />
<bt:String id="gv.label.newcase" DefaultValue="Nieuw" />
<bt:String id="gv.label.existingcase" DefaultValue="Bestaand" />
</bt:ShortStrings>
<bt:LongStrings>
<bt:String id="gv.descr.newcase" DefaultValue="Nieuw" />
<bt:String id="gv.descr.existingcase" DefaultValue="Bestaand" />
<bt:String id="gv.descr.home" DefaultValue="Deze knop is uitsluitend bedoeld voor test doeleinden." />
</bt:LongStrings>
</Resources>
</VersionOverrides>
</OfficeApp>
Not sure since when, but OWA supports taskpane add-ins now. The button to open the taskpane add-on that normally shows in the ribbon (in Outlook desktop) now shows at the right top of the email viewing pane, next to the "like" and "reply (all)" buttons.