VersionOverrides 1.0 element in the manifest file for a mail add-in

This element contains information for features that aren't supported in the base manifest.

Note

This article assumes that you're familiar with the overview of the VersionOverrides element, which contains important information about the element's attributes and variations.

Add-in type: Mail

Valid only in these VersionOverrides schemas:

• Mail 1.0

For more information, see Version overrides in the manifest.

Associated with these requirement sets:

• Mailbox 1.3
• Some child elements may be associated with additional requirement sets.

Child elements

The following table applies only to version 1.0 of <VersionOverrides> elements and only to mail add-ins.

Note

In iOS, only <WebApplicationInfo> is supported. All other child elements of <VersionOverrides> are ignored.

Element	Required	Description
Description	No	Describes the add-in.
Requirements	No	Specifies the minimum requirement sets that must be supported in order for the markup in the parent <VersionOverrides> to take effect. This should always be more restrictive than the <Requirements> element in the base portion of the manifest.
Hosts	Yes	Specifies a collection of Office applications. The child <Hosts> element overrides the <Hosts> element in the parent portion of the manifest.
Resources	Yes	Defines a collection of resources (strings, URLs, and images) that other manifest elements reference.
<VersionOverrides>	No	Defines add-in commands under a newer schema version. See Implementing multiple versions for details.
WebApplicationInfo	No	Specifies details about the add-in's registration with secure token issuers, such as Azure Active Directory V2.0.

Description

Describes the add-in. This overrides the <Description> element in any parent portion of the manifest. The text of the description is contained in a child element of the LongString element contained in the Resources element. The resid attribute of the <Description> element can be no more than 32 characters and must match the value of the id attribute of a child element of the <ShortString> element contained in the Resources element.

Add-in type: Task pane, Mail

Valid only in these VersionOverrides schemas:

• Task pane 1.0
• Mail 1.0
• Mail 1.1

For more information, see Version overrides in the manifest.

Associated with these requirement sets:

• AddinCommands 1.1 when the parent <VersionOverrides> is type Taskpane 1.0.
• Mailbox 1.3 when the parent <VersionOverrides> is type Mail 1.0.
• Mailbox 1.5 when the parent <VersionOverrides> is type Mail 1.1.

Example

The following is a simple example. For more complex examples, see the manifests for the sample add-ins in Office Add-in code samples.

<OfficeApp ... xsi:type="MailApp">
...
  <VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" xsi:type="VersionOverridesV1_0">
    <Description resid="residDescription" />
    <Requirements>
      <!-- add information on requirements -->
    </Requirements>
    <Hosts>
      <Host xsi:type="MailHost">
        <!-- add information on form factors -->
      </Host>
    </Hosts>
    <Resources>
      <!-- add information on resources -->
    </Resources>
  </VersionOverrides>
...
</OfficeApp>

Implementing multiple versions

A manifest can implement multiple versions of the <VersionOverrides> element which support different versions of the VersionOverrides schema. This can be done to optionally support new features in a newer schema while still supporting older clients that don't support the new features.

In order to implement multiple versions, the <VersionOverrides> element for the newer version must be a child of the VersionOverrides element for the older version. The child <VersionOverrides> element doesn't inherit any values from the parent.

To implement both the VersionOverrides v1.0 and v1.1 schema, the manifest would look similar to the following example.

<OfficeApp ... xsi:type="MailApp">
...
  <VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides" xsi:type="VersionOverridesV1_0">
    <Description resid="residDescription" />
    <Requirements>
      <!-- add information on requirements -->
    </Requirements>
    <Hosts>
      <Host xsi:type="MailHost">
        <!-- add information on form factors -->
      </Host>
    </Hosts>
    <Resources>
      <!-- add information on resources -->
    </Resources>

    <VersionOverrides xmlns="http://schemas.microsoft.com/office/mailappversionoverrides/1.1" xsi:type="VersionOverridesV1_1">
      <Description resid="residDescription" />
      <Requirements>
        <!-- add information on requirements -->
      </Requirements>
      <Hosts>
        <Host xsi:type="MailHost">
          <!-- add information on form factors -->
        </Host>
      </Hosts>
      <Resources>
        <!-- add information on resources -->
      </Resources>
    </VersionOverrides>  
  </VersionOverrides>
...
</OfficeApp>