MS Outlook Signature Editor Squishes HTML Signatures in Narrow Column

Issue

HTML signatures that contain tables get squished inside Outlook 2016 signature editor. They look normal when opened inside a browser or in Outlook email editor.

Resolution

This seems to happen when HTML table contains <TD> elements without explicit width. To resolve the issue edit original HTML file and specify width for all <TD> elements, e.g. <td style=”width:150px“>

December 2016
Microsoft Outlook 2016