What does Digit Two look like on Microsoft?

On Microsoft it is the design shipped in Windows 10 Anniversary Update, shown above at full size. Older revisions are listed beneath it.

When did Microsoft add Digit Two?

Microsoft first drew Digit Two in Windows 8.0, released October 26, 2012.

Microsoft Corporation has shipped 4 versions of Digit Two. Each is dated, so you can see when the design changed.

Microsoft Windows 10

Microsoft shipped a new design for Digit Two in Windows 10, released July 29, 2015. The previous design is shown beside it.

✳ marks a release that redrew this emoji. The rest re-shipped the design unchanged.

What does Digit Two look like on Microsoft?: On Microsoft it is the design shipped in Windows 10 Anniversary Update, shown above at full size. Older revisions are listed beneath it.
When did Microsoft add Digit Two?: Microsoft first drew Digit Two in Windows 8.0, released October 26, 2012.
How many times has Microsoft redrawn Digit Two?: Microsoft Corporation has shipped 4 versions of Digit Two. Each is dated, so you can see when the design changed.