This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 61%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERK%3C/text%3E%3C/svg%3E)
Hi Team,
we are using signinname property for storing username in our ad b2c custom policy. But when user tried to sign up and use a username which contains @ character then it is not allowed
i saw this field ia string with no restrictions.. stil it is not allowing
Can someone please help and tell what all characters are not allowed and where i can find this information?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(310.4, 54%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERJ%3C/text%3E%3C/svg%3E)
Hi, if the posted answer resolves your question, please mark it as the answer by clicking the check mark. Doing so helps others find answers to their questions.
Hi @Ronnie Kapoor , certain characters such as "@" are restricted in Azure resources. You can find the full list here: https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/resource-name-rules
User created restrictions are mainly to prevent profanity but Azure doesn't allow certain characters by default. Please let me know if you have any questions!
If this answer helped you please mark it as "Verified" so other users may reference it.
Thank you,
James
@Ronnie Kapoor
I just wanted to check in and see if you had any other questions or if you were able to resolve this issue?
If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.
----------
Please remember to "Accept Answer" if any answer/reply helped, so that others in the community facing similar issues can easily find the solution.
Hi @James Hamil , thank you for your answer, but i could not find the documentation pertaining to the case specific to my question for user sign up field in ad b2c . can you please pin point me to that documentation ?
Hi @Ronnie Kapoor , the document above pertains to everything contained in the services. Since the sign up field falls under Azure AD, the same rules apply.
Best,
James