You can use the discussion and subscription features in most browsers, but you have more capabilities when you use Microsoft Internet Explorer 4.0 or later. If you're using an earlier version of Internet Explorer or another browser (such as Netscape Navigator version 3.0 or later) and you have access to a Web site based on SharePoint Team Services from Microsoft, use the Discuss a Document feature on the Discussion Boards page to use the discussion and alerts features.
Most discussion and alerts features work when you use Office Server Extensions, available in Office 2000. However, the following discussion features require a server that is running SharePoint Team Services 1.0:
Note On a discussion server running Windows SharePoint Services, you cannot create subscriptions by using the Web Discussions toolbar. For information about creating alerts, which replace subscriptions in Windows SharePoint Services, see Windows SharePoint Services Help.