Article ID: 2757747 - View products that this article applies to.
When a federated user tries to sign in to a Microsoft cloud service such as Office 365, Microsoft Azure, or Microsoft Intune from a sign-in webpage whose URL starts with https://login.microsoftonline.com/login, authentication for that user isn't successful. Instead, the user receives the following error message:
This issue may occur if the following steps were performed:
Sorry, but we're having trouble signing you in
Please try again in a few minutes. If this doesn't work, you might want to contact your admin and report the following error:
To resolve this issue, make sure that the user's user principal name (UPN) contains only supported characters. Sign-in fails if the UPN contains characters that aren't supported.
Microsoft cloud services supports the following characters in the UPN:
aA13.firstname.lastname@example.orgHowever, the following UPN isn't supported:
Still need help? Go to the Office 365 Community
(http://community.office365.com/)website or the Azure Active Directory Forums
Article ID: 2757747 - Last Review: October 27, 2014 - Revision: 15.0
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