We are a bit unusual in that we use Notes and do not store email addresses in AD. I found this thread below, which somewhat addresses my issue.
If I were to configure a custom profile import with LDAP query or BDC and then import profile properties, would that help? Is email considered a base attribute? Can you even map to it from a non-AD source? Or would I only be able to map to, say, work email? If I did do that (map from LDAP or BDC to work email) would it work with alerts, workflows, etc. if all users only had a work email profile property and email was not populated?
I hope this make sense. I realize I'm a bit of an outlier.
social.technet.microsoft.com/.../e745d78c-0dfd-4d59-bdda-e3fb00b4a4fd