Need SMTP_ADDRESS Mandatory on New User Create/User Maintenance

Question

Is there a way to require entry of email address upon new user creation or user maintenance without an ABAP enhancement?
It appears that function module ADDR_PERS_COMP_COMM_MAINTAIN writes email address to database for users, but before I try to enhance the code, I'd like to see if this is a change that can be made without code modifications.
Use of report RSADRCK7 is not feasible; users would need to be done one at a time.
This requirement would apply only to functions (SU01) by BASIS/Security; users must remain unable to maintain their email address via System>UserProfile>Own Data.

Answer 1

> enhancement inserted for SU01, screen 0900, to error when SZA5_D0700-SMTP_ADDR is initial, in SAPLSZA5, form D0700_OK_CODE.
If that does not work, then the easiest option is a check after the user creation to verify that all users who are meant to have an SMTP entry in the address data, also have one (from the correct domain, etc...).
Alternately, you can create a standard transaction variant for SU01 and change the screen of the address data tab. When saving (or proceeding to the next screen), the address data must have been maintained.
The first option is certainly much easier and less intrusive to implement...
Do you also use self-registration scenarios? Is that the reason for your question?
Cheers,
Julius