Specify “Install for” when installing package via Metadata API

Trying to automate some package installs via Apex using the Metadata API.

When you install a package via the UI you get asked who to install for (Defaults to Admins Only):

Is there any way to specify “All Users” when performing via the Metadata API? I couldn’t seem to find mention of it in the documentation..

Current XML being used to install a package (portions redacted)

<?xml version="1.0" encoding="UTF-8"?>
    <env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
        <env:Header>
            <urn:SessionHeader xmlns:urn="http://soap.sforce.com/2006/04/metadata">
                <urn:sessionId>{sessionId}</urn:sessionId>
            </urn:SessionHeader>
        </env:Header>
        <env:Body>
            <createMetadata xmlns="http://soap.sforce.com/2006/04/metadata">
                <metadata xsi:type="InstalledPackage">
                    <versionNumber>2.4</versionNumber>
                    <fullName>{Namespace}</fullName>
                </metadata>
            </createMetadata>
        </env:Body>
    </env:Envelope>

Seems a big oversight to have not included the ability to set this as setting to Admins only by default causes issues….at least for me

Answer

Attribution
Source : Link , Question Author : Eric , Answer Author : Daniel Ballinger