Article ID: 2707380 - View products that this article applies to.
After you run the Microsoft Online Services Diagnostics and Logging (MOSDAL) Support Toolkit, the Active Directory Federation Services (AD FS) diagnostics log shows the following error message:
Note This log is located at Admin_Applications\SSO_Diagnostic_Tests\ADFSDiagnostic.txt.
The Microsoft Office 365 Authentication System login URL could not be accessed
Additionally, you may notice that the client computer's Internet browser can't load the login.microsoftonline.com webpage when you sign in to your Microsoft cloud service such as Office 365, Windows Azure, or Windows Intune by using a federated account.
This issue may occur if network problems are limiting access to the cloud service.
To resolve this issue, follow the steps that are described in the following article in the Microsoft Knowledge Base:
2637629Still need help? Go to the Office 365 Community
(http://support.microsoft.com/kb/2637629/ )How to troubleshoot computer issues that limit Office 365 rich client authentication
(http://community.office365.com/)website or the Windows Azure Active Directory Forums
Article ID: 2707380 - Last Review: October 30, 2013 - Revision: 14.0