
tymsb (tymsb) asked a question.
Hi community,
As per Okta documentation, 'email' property should be within 5 to 100 characters. And we are also setting up the domain whitelisting in our app. Therefore, I have the following questions:
- Advised limit to the email prefix?
- Advised limit to the domain name?
- Does Okta accept sub-domains?
Thank you

Hi, @tymsb (tymsb)
Thank you for posting on our Community page!
I have done some research and found this article which better explains supported email attributes
Additionally, you can also take a look on this article on custom domains:
In short, the limit of 100 characters applies to the entire email address, including subdomains. There is no specific limit for each attribute except top-level domains (the 'com' portion of the email address) which range from min 2 to max 20 characters.
Hope this helps!
Thank you for reaching out to our Community and have a great day!
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