An Office 365, Microsoft Azure, or Microsoft Intune user uses Windows Internet Explorer 8 to access email messages or sign in to a Secure Sockets Layer (SSL) website that requires authentication. However, when the user opens a new tab or a new window, the user is prompted to sign in again
This issue occurs when Internet Explorer 8 creates a new process for a new tab or a new window. In this case, the SSL session state of the new tab or of the new window isn't shared, and an additional authentication dialog box appears.
To fix this issue, install the hotfix that's referenced in the following Microsoft Knowledge Base article:
977417 You are prompted to provide authentication again when you open a new tab or a new window in a SSL Web site in Internet Explorer 8
To apply this hotfix, you must have Internet Explorer 8 installed on a computer that's running one of the following operating systems:
Microsoft Azure Cloud Services, Microsoft Azure Active Directory, Microsoft Office 365, Microsoft Intune, CRM Online via Office 365 E Plans, Microsoft Azure Recovery Services, Microsoft Exchange Online, Windows Internet Explorer 8, Office 365 User and Domain Management, Office 365 Identity Management