Article ID: 2425774 - View products that this article applies to.
When you try to run the Microsoft Azure Active Directory Sync tool, you receive an email message that resembles the following:
This issue can occur if an on-premises user object includes one of the following characters in its primary SMTP email address:
To resolve this issue, change the on-premises user's primary SMTP address by removing the character that's causing the issue. After the character is removed, directory synchronization will use the string in the new primary SMTP proxy address to create the user's user principal name (UPN) and primary SMTP address.
Still need help? Go to the Office 365 Community
(http://community.office365.com/)website or the Azure Active Directory Forums
Article ID: 2425774 - Last Review: July 9, 2014 - Revision: 34.0