Install Phone Book
In a Google Workspace app (Docs, Sheets or Slides), click Extensions > Add-ons > Get add-ons.
Type Phone Book in the search bar and press Enter.
Click on the Phone Book tile from the search results.
Click Install and follow the steps that appear on the screen.
You will be asked to grant permissions and to select a Google account to associate the add-on with.
Click Done to complete the installation.
The Phone Book add-on is now installed and you are ready to create a phonebook.
You can also install the add-on directly from Google Workspace Marketplace.