Discontinued functionality in the entire Tridion Sites product

This topic lists functionality that is discontinued, not in a specific part of the Tridion Sites product, but across the product in its entirety.

Monitoring
The Monitoring feature, previously used for monitoring the responsiveness of the various software components of the product, is discontinued. Software monitoring through third-party software products is suggested as an alternative.
User Generated Content (UGC)
The UGC feature, previously used for rating and commenting on published website content, is discontinued. Rating and commenting functionality offered through third-party software products is suggested as an alternative.
Audience Manager
The Audience Manager feature, previously used for managing known contacts who visit your website, is discontinued.
Outbound E-mail
The Outbound E-mail feature, previously used for publishing content to an e-mail channel for the purposes of e-mail marketing, is discontinued.