
MelindaY.34336 (Customer) asked a question.
I have a scenario where it is necessary for multiple user accounts to be managed by a single person. Is it acceptable to use an invalid email address for the primary email of these accounts (to satisfy the unique username constraint) and the same secondary email so that notifications are sent to the same individual who is responsible for managing these accounts? Or is it preferred that only valid email addresses be used for the primary email?

Hello @MelindaY.34336 (Customer),
The importance of using valid email addresses is because the Primary email is the method that Okta and AD use to authenticate to each other, also a valid email is needed because that address will be used as an authentication and verification method. If the address is invalid the user would not be able to receive the authentication emails and validate his account.
You can learn more about this topic using the following links:
https://help.okta.com/en/prod/Content/Topics/Security/mfa/email.htm
https://help.okta.com/en/prod/Content/Topics/Directory/Directory_AD_Field_Mappings.htm
Please let us know if this was useful and allow you to solve your problem.
Regards,
Natalia
Okta Inc.