We are running one ZCS 7.1 OSS server for two different company domains. All of our email authentication passes thru an Active Directory server where each user is a member of each domain.

My problem is, I have 5 users with email address for both company1 and comapny2. Let say user1@company1.com and user1@company2.net. Is it possible for user1@company2.net to authenticate with AD of user1@company1.com.

In general, can I have two different email accounts authenticating with the same LDAP or AD server that has a different domain name?