<service.configuration>
        <exchange uri="https://outlook.office365.com/EWS/Exchange.asmx"
                  username="..." password="..." folder="Inbox">
            <rule>
                <conditions>
                    <regex property="Body" pattern="Group Name:\s+(?&lt;name&gt;[^&lt;]+)" />
                </conditions>
                <actions>
                    <forward-message to="...">
                        <rewrite-property property="Subject">
                            {?} [{$name}]
                        </rewrite-property>
                    </forward-message>
                    <move-message folder="Processed" />
                </actions>
            </rule>
        </exchange>
    </service.configuration>