How can I see some exchange attributes (mailnickname, targetaddress etc..) on the target user object?

Hello,

We have just AD connector integration. We have no exchange integration via sync editor. But We add exchange modules on OneIM database.  I created CCC_MailNickname, CCC_TargetAddress on OneIM side in ADSAccount table. But I can't see these attributes on the target system side. Why?

In our other custemers' environment we are both connected AD and Exchange systems with connector. I can see these attributes on the target system schema. (MailNickname, targetaddress etc..). Only I noticed that the difference is we have no Exchange integration with connector.

Do you have any idea? How can I get these attributes on AD sync project, on the target system schema? 

Do I need any special permission for example 'Domain Admin' or 'Schema Admin' or 'Organizational Management' for getting thoose kind of exchange attributes on AD schema? I don't need to use exchange connector because I don't manage this part with exch connector.  We manage it just set MailNickName, Targetaddress, proxyaddress attributes on AD schema. 

BR,

Ferhat