From time to time, we are obligated to remove fonts from the font library; we refer to this as “retiring” the font. Font retirement may happen for a variety of reasons, but is typically at the request of the foundry, when a typeface is no longer available for licensing and distribution.
The majority of font retirements are because the font family has been updated with significant changes that necessitate replacing it with an entirely new family. For example, Alverata PE from TypeTogether was overhauled, retired, and replaced by the family Alverata.
Adobe continues to serve the fonts to any published projects, so existing websites will not be affected when fonts are retired. However, retired fonts are not available to use in new projects, and if you remove the font from an existing project, you cannot add it again.
Thirty days before the font is retired, we’ll put a notice on the font family page with the retirement date and any other details, such as the name of a replacement font family.
If you have a font activated that is scheduled to be retired, we’ll also email you seven days prior to retirement to inform you of the upcoming change.
After we retire the font, it will automatically be removed from your list of active fonts, and it will no longer appear in the Fonts tab of the Creative Cloud desktop application or in your desktop software font menus.
If there is no updated version of the font that suits your needs and could be substituted, you would need to see if the foundry has the fonts available for purchase from their own website or through a reseller.