Attributes for Exchange 5.5 Mailboxes : objectClass
This is the object class of a mailbox object. It is one of the basic elements in the attribute set of a mailbox.
objectClass
| LDAP name | objectClass |
| Data type | Strings (Object Identifiers) |
| Multivalue (Array) | Yes |
| Heuristic | 2 => Replicated between sites, no operational attribute |
| Access category | System access only |
| Ex55 Database name | Object-Class |
Object class of a mailbox has always the following array:
- organizationalPerson
- person
- Top
The schema class organizationalPerson represents hereby the actual object class of the mailbox - this is the class you have to provide when wanting to create a mailbox object. This main class (also called structural class) is always the first array member in Exchange directories - this is different to Active Directory object classes). If you want to make sure that the object you deal with actually is a mailbox, you will have to use the following script code:
Even easier would be the use of the ADSI-Interface attribute Class, because then the actual object class 'organizationalPerson' is returned without array and the check for the object class would look like this:
The other classes 'person' and 'Top' are the superior classes from which organizationalPerson is deduced hierarchically. When an mailbox object is created, the attribute objectClass can't be changed afterwards.