This allows you to write code specifically targeting Outlook mobile apps. this targets both Android and IOS apps at the same time.
This is most usefull for times when Outlook for IOS decides to create its own style seperate from all other mobile clients
<style type="text/css">
body[data-outlook-cycle] .oa-hide {
display: none !important
}
body[data-outlook-cycle] .oa-show {
display: block !important;
}
</style>
<!--[if !mso]><!--->
<div style="display:none;" class="oa-show">
Content to show only in Outlook app
</div>
<!--<![endif]-->
<div class="oa-hide">
content to hide only in Outlook app
</div>