Can’t create a new Receive connector after installing Update Rollup 1 for Exchange Server 2007 Service Pack 3

Recently i had to migrate Exchange Server 2007 to another host. I installed the latest release with SP3 included and ran the install of the Update Rollup 1 for Exchange Server 2007 Service Pack 3. Pretty easy straight forward until i tried to create a new Receive Connector

  

Error:

Active Directory operation failed on xxxx.local. This error is not retriable. Additional information: The parameter is incorrect.

Active directory response: 00000057: LdapErr: DSID-0C090C26, comment: Error in attribute conversion operation, data 0, v1772

The requested attribute does not exist.

I longer research took me to the hint - i didn't expect that comming with a Service Pack - that you have to extend the AD schema prior installing Exchange Server 2007 SP3[1]:

If you want to run the Setup program in upgrade mode to perform an in-place upgrade from a beta version of Exchange 2007 SP3, you must first prepare Active Directory and the domains. 

Download the Service Pack 3  again or like in my case use the install media including the SP3 and run Setup.com /PrepareSchema agains the schema master. This should fix the LDAP errors.

[1]  http://technet.microsoft.com/en-us/library/ff607233%28EXCHG.80%29.aspx