‘Bing Chat Enterprise’ automatically enabled as of August 17th

Commercial Data Protection: User and business data is protected, chat data is not saved, Microsoft has no eye-on access to data, and chat data is not used to train the underlying models
Availability and Cost: Bing Chat Enterprise will be turned on by default on August 17, 2023, and will be no additional cost for Microsoft 365 SKUs. An add-on SKU for Office 365 E Plans will be offered at USD$5 per user per month.
Opting Out: Customers who do not want to offer Bing Chat Enterprise to their users can opt out via https://aka.ms/TurnOffBCE. This will also prevent the use of Bing Chat (consumer) for Office 365/Microsoft 365 users signed into Edge.
Features: some features such as chat history, plugin support, Bing Image Creator and Visual Search in Chat are not supported initially.