Accessing Custom Attributes using ADO, LDAP or ADSI

[Kenneth Kolstad]

I am using the following string to attempt to access the custom attributes in our exchange server. Using this query I am able to access all the standard fields but can't access the custom attributes.

<GC://exchangeserver:389/cn=username,cn=Recipients,"ou=organizationalunito= IADB>;(objectClass=*);Extension-Attribute-1;subtree

Does anyone know why this doesn't work and how I can make it work?

Thanks