You are prompted to re-enter credentials frequently when using Work Folders by using ADFS authentication in Windows 8.1

To resolve this issue, the AD FS administrator is required to add Work Folders as the supported user agent by running the following cmdlet on the AD FS server:

Set-AdfsProperties -WIASupportedUserAgents ((Get-AdfsProperties).WIASupportedUserAgents + 'MS_WorkFoldersClient') 

This cmdlet adds "MS_WorkFoldersClient" as a list that AD FS recognizes, and the cmdlet enables the application (in this case it is Work Folders) to use Windows integrated authentication to authenticate by using the logged-on user credentials. Additionally, the AD FS administrator is required to enable
WindowsIntegratedFallbackEnabled by using the following cmdlet:

Set-AdfsGlobalAuthenticationPolicy -WindowsIntegratedFallbackEnabled True 

On the client computer, install update rollup 2975719. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

2975719 August 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2