ms-outlook:// URI scheme documentation (Outlook for Android 4.2212.2)

ms-outlook_actions.xml

<?xml version="1.0" encoding="utf-8"?>
<actions xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:aapt="http://schemas.android.com/aapt">
    <action intentName="actions.intent.CREATE_MESSAGE">
        <fulfillment urlTemplate="ms-outlook://emails/new{?to,name,body,type}">
            <parameter-mapping intentParameter="message.text" required="true" urlParameter="body"/>
            <parameter-mapping intentParameter="message.@type" urlParameter="type"/>
            <parameter-mapping intentParameter="message.recipient.name" urlParameter="name"/>
            <parameter-mapping intentParameter="message.recipient.email" urlParameter="to"/>
        </fulfillment>
        <fulfillment urlTemplate="ms-outlook://emails/new"/>
    </action>
    <action intentName="actions.intent.OPEN_APP_FEATURE">
        <fulfillment urlTemplate="{@url}"/>
        <fulfillment urlTemplate="ms-outlook://emails"/>
        <parameter name="feature">
            <entity-set-reference entitySetId="openAppFeatureParamSet"/>
        </parameter>
    </action>
    <entity-set entitySetId="openAppFeatureParamSet">
        <entity alternateName="@array/agendaCalendarView" name="agendaView" url="ms-outlook://events/view?action=agenda"/>
        <entity alternateName="@array/dayCalendarView" name="dayView" url="ms-outlook://events/view?action=day"/>
        <entity alternateName="@array/monthCalendarView" name="monthView" url="ms-outlook://events/view?action=month"/>
        <entity alternateName="@array/focusedInboxSynonyms" name="focusedInbox" url="ms-outlook://emails/inbox/focused"/>
        <entity alternateName="@array/otherInboxSynonyms" name="otherInbox" url="ms-outlook://emails/inbox/other"/>
    </entity-set>
    <action intentName="actions.intent.CREATE_THING">
        <fulfillment urlTemplate="ms-outlook://events/new{?title,description}">
            <parameter-mapping intentParameter="thing.name" required="true" urlParameter="title"/>
            <parameter-mapping intentParameter="thing.description" urlParameter="description"/>
        </fulfillment>
        <fulfillment urlTemplate="ms-outlook://events/new"/>
    </action>
    <action intentName="actions.intent.GET_THING">
        <fulfillment urlTemplate="ms-outlook://search{?querytext}">
            <parameter-mapping intentParameter="thing.name" required="true" urlParameter="querytext"/>
        </fulfillment>
        <fulfillment urlTemplate="ms-outlook://search/"/>
    </action>
    <action intentName="custom.actions.intent.EVENT_VIEW" queryPatterns="@array/eventNextQueries">
        <fulfillment urlTemplate="ms-outlook://events/view?action=next"/>
    </action>
    <action intentName="custom.actions.intent.CALENDAR_VIEW" queryPatterns="@array/calendarViewQueries">
        <fulfillment urlTemplate="ms-outlook://events/view?action=day"/>
    </action>
    <action intentName="custom.actions.intent.PLAY_EMAILS" queryPatterns="@array/PlayEmailQueries">
        <parameter name="verb" type="https://schema.org/Text"/>
        <fulfillment urlTemplate="ms-outlook://pme{?action}">
            <parameter-mapping intentParameter="verb" required="true" urlParameter="action"/>
        </fulfillment>
        <fulfillment urlTemplate="ms-outlook://pme"/>
    </action>
</actions>

notes.md

Using the ms-outlook schema you are able to launch Outlook programmatically. Since I couldn't find any clear documentation on how to use this schema I decompiled the apk of version 4.2212.2.

Here is a simple form of documentation:

actions.xml shows that the app accepts the following urls (prepended with ms-outlook://):

• *empty string*
• emails
• emails/inbox These options open the email page on the tab last used.
• emails/inbox/focused
• emails/inbox/other These options open the email page on the corresponding tab (focused or other).
• emails/new{?to,name,body,type} This opens the page for writing a new calendar event. Params to, name and body are optional and explain themselves.
• events/new{?title,description} This opens the page for writing a new calendar event. Params title and description are optional and explain themselves.
• events/view{?action=[next,agenda,day,month]} This opens the calendar page. action param is optional and can be next/agenda, day, month which will set the how the overview is displayed. (I couldn't find the action corresponding to the 3-day view easily, but I assume there is one)
• search{?querytext} This opens the search page. queryText param is optional
• pme{?action} I assume this is for Outlooks "Play My Email" function but I couldn't get this one to work.

Note: If the app is displaying an email while one of these first five urls is used, it does not navigate to that page. This does not happen while displaying a calendar event. Seems like this might be unintentional.

@keithlyding I wrote this down since I was looking into an issue at a previous job and couldn't find any documentation. I haven't been involved in this for a while so I can't help you. You can try to find any new options yourself by unpacking the latest outlook apk and looking for this file. Maybe they have updated some stuff.