Read Active Directory Exchange Attribute

Hi
 
I read some Active Directory Attributes via the ADODB connection.
displayName,sAMAccountName,legacyExchangeDN,homeMTA,homeMDB.
This works fine.
But I would like to read the Attribute msExchRecipientTypeDetails too, but this doesn't work.
I can add this Attribute to the LDAP filter and filter the records by Type but I would get the info for this Attribute.
Do you have an idea how this attribute can be read ?
 
Thanks
Peter

Can't tell you much without seeing the code and how you are trying to read/access the attribute.