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"Microsoftonline.com could not be accessed" error after you run the MOSDAL Support Toolkit
Article ID: 2707331 - View products that this article applies to.
Not sure what release of Office 365 you're using? Go to the following Microsoft website:
Am I using Office 365 after the service upgrade?
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:
Note This log is located at Admin_Applications\SSO_Diagnostic_Tests\ADFSDiagnostic.txt.
Microsoftonline.com could not be accessed.
Additionally, when you use single sign-on (SSO)-enabled user ID credentials to sign in to Office 365 resources, the client computer may be unable to resolve IP addresses for microsoftonline.com.
This issue may occur if there are network problems that limit access to Office 365.
To resolve this issue, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/2637629/ )How to troubleshoot computer issues that limit Office 365 rich client authentication
Still need help? Go to the Office 365 Community
Article ID: 2707331 - Last Review: May 15, 2013 - Revision: 6.0