Looking to use existing way or create a property on Person in Active Directory to contain multi-value strings of external email addresses, as to be indexed for quick searchability.
The idea behind it is we would have an outside system in place where a user would sign up at for something which would then in return create an AD account after it cross-checked some other unique information.
One thing it would check was whether their personal e-mail, like email@example.com or gmail or whatever, already existed for a user in the Active Directory database.
Is there a field that could be utilized for that?
If created what's the easiest way to do that?
Is there perhaps another system that integrates that could possibly even do away with that approach, and manage AD account creation/matching for us?