Extending the attributes

[ppuskur@desmac.com]

Hi, 

I an newbie to LDAP.Is there a way to extend the objectclass to hold attributes 
like microsft exchange does.I want to switch from microsft exchange to 
freeworld.Is there a way to present objectclass with obtaning of object id. 

Any help would be appreciated.......... 

Thanks in Advance...... 

Partha