What are the options and products (Microsoft) that are available in order to implement SSO. I'm facing a problem when opening office documents (from SharePoint library) the browser will prompt for credentials. How can I overcome the problem, is it by implementing SSO?.



Single-Sign-On (SSO) process authenticates recognized users and opens access to multiple applications, to which they have been granted rights. Logging in the first time authorizes the users to access all applications and enables them to switch between them as needed. The users then don’t need to enter their password each time. This lasts until the Users log out of the session.

For SSO to work with SharePoint and related applications, all of them must be in the same Intranet Zone where by default the Windows logon credentials are shared. If an application lies in the Extranet Zone or in the Internet Zone, then its users will be prompted for password each time they try to access it.

With the help of Claims Based Authentication (CBA) and Active Directory Federation Services (AD FS) in SharePoint 2013, Users are provided with an SSO capability allowing them to use the data and applications they need. Users’ credentials are stored in an encrypted format within an SSO credentials database. These are passed on to the backend enterprise applications on behalf of the Users whenever they try to access an application.

also have a look on this link http://blogs.technet.com/b/steve_chen/archive/2010/06/25/multiple-logon-while-open-office-document-from-sharepoint.aspx

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    Remember, with SharePoint apps MS recommends that the app domain should not be in the intranet zone. So, with apps, you need to choose between usability and security. (If you follow MS recommendations on security, then users will get a login prompt each time they navigate to an app, or each time they visit a page with an app part) – Mike2500 Jun 17 '14 at 13:42

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