How to create a new Custom Attribute with StringCollection as datatype in AD B2C

Yashwanth Yenugu 116 Reputation points

I can only see string, int and boolean in the dropdown, but I need to create a custom attribute with StringCollection as datatype like Email Addresses attribute.

Microsoft Entra External ID
Microsoft Entra External ID
A modern identity solution for securing access to customer, citizen and partner-facing apps and services. It is the converged platform of Azure AD External Identities B2B and B2C. Replaces Azure Active Directory External Identities.
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  1. AmanpreetSingh-MSFT 56,506 Reputation points

    @Yashwanth Yenugu StringCollection datatype is available only in Custom Policy as of now. Refer to for all available Datatypes in custom policies.

    Also, let me know if the issue in your previous post ( is resolved.


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