Somehow I hit a magic key combination in Microsoft Lync that is sending strike-through text. When I look at the "A" icon (text properties), I don't see an option for strike-through.
How can I disable strike-through text in MS Lync?
Ctrl+T is the keyboard shortcut for striking through text, according to this document from Microsoft. While it doesn't specify that it's a toggle, I would try pressing Ctrl+T again to see if that disables strikethrough.