What does Closed Book look like on Microsoft Teams?

On Microsoft Teams it is the design shipped in 15.1, shown above at full size. Older revisions are listed beneath it.

When did Microsoft Teams add Closed Book?

Microsoft Teams first drew Closed Book in 1.0, released February 9, 2022.

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

Microsoft Teams 15.0

This is the design Microsoft Teams introduced in 1.0, shipped again unchanged. It was not redrawn for this release.

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

What does Closed Book look like on Microsoft Teams?: On Microsoft Teams it is the design shipped in 15.1, shown above at full size. Older revisions are listed beneath it.
When did Microsoft Teams add Closed Book?: Microsoft Teams first drew Closed Book in 1.0, released February 9, 2022.
How many times has Microsoft Teams redrawn Closed Book?: Microsoft Corporation has shipped 4 versions of Closed Book. Each is dated, so you can see when the design changed.