Good afternoon.
For me a problem of such character.
 There is a domain with several UPN suffixes. When there is a user, to it is assigned any UPN suffixes. Depending on sort UPN of a suffix, to it there is an e-mail address.

SD + v.7.5.0 Build 7506 scans the domain and imports users.

All it works, while for the employee does not vary
UPN the suffix, also is not assigned other domain. THEN at import from AD, SD + creates the new employee and considers as its external client.

Can it is necessary to change the mechanism of import from AD and to be anchored to SID the account?