Re: Outlook 2013 issue after SSO config

Hi ThomasBrown,

Thanks for your update.

Based on the error message that you have provided, the issue caused by the reason that you don’t use the third-party SSL certificate, therefore, Outlook cannot connect to Office 365 via Sigle Sign-on (SSO). To resolve the issue, you need to use a third-party SSL certificate when you configure SSO. For more detailed information, please refer to the link below:
Configure single sign-on: http://technet.microsoft.com/en-us/library/hh967628.aspx

Best Regards,
Anna Shi