Article ID: 2439357 - View products that this article applies to.
When you try to create a user name that contains a special character in Microsoft Office 365, you receive one of the following error messages:
Within the Office 365 portal
Invalid user name
Only letters and numbers are allowed. No spaces.
Within Microsoft Azure Active Directory Module for Windows PowerShell
New-MsolUser : Invalid value for parameter. Parameter Name: UserPrincipalName.
At line:1 char:13
Within Exchange Online Windows PowerShell
A Windows Live error occurred while provisioning for "firstname.lastname@example.org". The e-mail name contains invalid characters.
This behavior occurs because certain special characters aren't permitted in user names that you create in the Office 365. These special characters include but aren't limited to the following:
However, the following exceptions apply:
When you create a new user in Office 365, make sure that you don't use any of the special characters that are listed in the "Cause" section.
Still need help? Go to the Office 365 Community