I built an HTML block with a personalized code in the email and I would like to know why the text is displayed twice when opening the email in Outlook from a desktop device, only when using Windows OS.
<!--[if mso]>
<v:rect xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="urn:schemas-microsoft-com:office:word" style="height:42px;v-text-anchor:middle;width:218px;" arcsize="5%" strokecolor="#ffffff" fillcolor="#ffffff">
<w:anchorlock/>
<center style="color:#1672b9;font-family:'Noto Sans', sans-serif;font-size:12px; letter-spacing:1.5px; font-weight:bold;border-radius: 15px;">Personalized code</center>
</v:rect>
<![endif]-->
<a style="background-color:#ffffff;border-radius: 15px;color:#1672b9 !important;display:inline-block;font-family:'Noto Sans', sans-serif;font-size:12px;line-height:44px;text-align:center;text-decoration:none;width:100%;-webkit-text-size-adjust:none;mso-hide:all; font-weight:bold; letter-spacing:3px;">Personalized code</a>
Use this:
<!--[if mso]>
<v:rect xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="urn:schemas-microsoft-com:office:word" style="height:42px;v-text-anchor:middle;width:218px;" arcsize="5%" strokecolor="#ffffff" fillcolor="#ffffff">
<w:anchorlock/>
<center style="color:#1672b9;font-family:'Noto Sans', sans-serif;font-size:12px; letter-spacing:1.5px; font-weight:bold;border-radius: 15px;">Personalized code</center>
</v:rect>
<![endif]-->
<![if !mso]>
<a style="background-color:#ffffff;border-radius: 15px;color:#1672b9 !important;display:inline-block;font-family:'Noto Sans', sans-serif;font-size:12px;line-height:44px;text-align:center;text-decoration:none;width:100%;-webkit-text-size-adjust:none;mso-hide:all; font-weight:bold; letter-spacing:3px;">Personalized code</a>
<![endif]>
See also: "How do I make an “else” in an IE HTML conditional?".