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WilsonGillian-7157 asked sikumars commented

What's the specific Guest User Email Address format support?

Hi

What are the limitations on the supported email format when creating a Guest User in Azure AD? It doesn't seem to support all valid email addresses, so I'm just looking for specifics on what is valid in Azure AD.

For example (but not limited to): String length, characters, internationalisation etc.

Also - are the limitations on creating the user via the UI, aligned with those creating the user via MS Graph API? If not, what are the limitations for both methods of creating the user?

Referring here, i understand the limitation around the plus (+): https://docs.microsoft.com/en-us/azure/active-directory/external-identities/add-users-administrator#add-guest-users-to-the-directory

azure-ad-graphazure-ad-b2b
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Hello @WilsonGillian-7157,

Thanks for reaching out.

I will investigate and update you with my findings soon. Thanks.

Regards,
Siva Kumar Selvaraj

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Thanks Siva!

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sikumars avatar image sikumars WilsonGillian-7157 ·

Hello @WilsonGillian-7157, Just checking in to see if the below answer helped. If this answers your query, please don’t forget to click "Accept the answer" and Up-Vote for the same, which might be beneficial to other community members reading this thread. And, if you have any further query do let us know.
Thanks,

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sikumars answered

Hello @WilsonGillian-7157,

Thanks for reaching out.

We do checks on below things in addition to the limitation around the plus (+)
• Email syntax
• Length
• Domain is valid
• Along with additional checks consistent with all users


Please "Accept the answer" if the information helped you. This will help us and others in the community as well.

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