Exchange 2003, 2007 & 2010 Topology discovery failed, error 0x80040a02 (DSC_E_NO_SUITABLE_CDC)

Exchange 2003, 2007 & 2010 Topology discovery failed, error 0x80040a02 (DSC_E_NO_SUITABLE_CDC)

A client has been struggling with Exchange 2003 for some time now and I’ve got the project to roll out Exchange 2010. The first hurdle I come to is a new incarnation of a pre-existing problem from Exchange 2003 – simply put “Can’t find a domain controller”. Which means it can’t mount the Information Store. Brill.

You’ll need to edit the Default Domain Controllers Policy in Group Policy.

1. Computer Configuration
2. Windows Settings
3. Security Settings
4. User Rights Assignment
5. Mange auditing and security log

Add “Exchange Servers” or “Exchange Enterprise Servers” to that policy.
gpupdate /force on the domain controller and restart the Exchange Services