Users with a subscription to Adobe Creative Cloud can use Adobe Fonts in the brand manager. To integrate these fonts into the brand, you need to add them to a webproject on Adobe Fonts first.
The webproject will then give you a code, from which you can copy the URL. As marked in green below.
In the brand manager at Typography, when adding a font, select Adobe Font as Font source and paste the copied URL created in Adobe Fonts. When clicking on Load font, the editor will retrieve the fonts and make them available in the brand manager.
Also use a fallback font
When selecting a custom font such as an Adobe Font or Google Font, you will have the option to provide a fallback. This is useful when the font is not supported by the recipient. In that case, the fallback or your choice will be shown, instead of a random serif or sans-serif font.