Using the command line

Edit online

You can use the command provided here to add an object class using the command line.

About this task

idsldapmodify -D <adminDN> -w <adminPW> -i <filename>
where <filename>contains: 
dn: cn=Schema
changetype: modify
add: objectclasses
objectclasses: ( <myobjectClass-oid> NAME '<myObjectClass>' DESC '<An object class 
I defined for my LDAP application>' SUP '<objectclassinheritance>'
<objectclasstype> MUST (<attribute1> $ <attribute2>) 
MAY (<attribute3> $ <attribute4>) )