I am trying to migrate from exchange 2003 to a new server with exchange 2007. The problem is getting exchange 2007 to install. On the new server I have windows server 2008 installed. When I try to install exchange 2007 I get the following error: Organization Prerequisites Failed Error: One or more Active Directory Connectors have been found. Please remove all Active Directory Connectors before installing Exchange 2007. In my enviornment I only have 2 domain controllers. both are running windows server 2003 with service pack 1 installed. however one of the domain controllers have exchange 2003 installed. I have checked both servers and made sure that the active directory connectors were NOT installed. I have no idea why I keep getting this error...I have looked all over the internet and I keep reading over and over that you have to uninstall the active directory connectors...but I have checked over and over and I dont have any installed.I checked in the add/remove programs and in the"services" I did not see any active directory connectors. What am I doing wrong?

Hi, Does ADC show on any of DCs with below procedure? Open ADSIEdit.msc -> Configuration container -> Expand the CN=Configuration container -> Expand the CN=Sites container -> Expand CN=<Your Sites> -> Expand CN=Servers -> Expand CN=<Your ServerName> -> CN=Exchange Settings -> In the right pane, verify CN=Active Directory Connector (Server)

Hi, Microsoft Exchange Server2007 setup cannot continue because one or more Active Directory Connectors (ADC) have been found in the current Microsoft Exchange environment. ADC replicates objects from Exchange Server version 5.5 to the ActiveDirectory directory service in a mixed mode Microsoft Exchange environment and is not supported by Exchange2007. If do not have Exchange 5.5 in your Organization you can safely remove Active Directory Connector from Active Directory. You can follow the below steps to find ADC and remove it. 1. Verify if the Microsoft Exchange Site Replication Service is stopped & disabled on the Exchange 2003 servers. 2. Open up the Services console(Note: run services.msc) on the Exchange 2003 server and then look for Microsoft Exchange Active Directory Connector Service.3. If it exists, stop and disable the service.4. On the Exchange 2003 server, go into the Control Panel & look under Add/Remove Programs for Active Directory Connector.5. If it exists, uninstall it.6. If there are multiple Exchange 2003 servers then you need to determine where the ADC service is installed, open up Active Directory Sites & Services from a Domain ControllerNote: Make sure to select the top most container "Active Directory Sites & Services (Domain name)>Right Click>View>Show Services Node should be selected.7. Navigate to each server & check the "Exchange Container" for any ADC service and then delete.8. Install Windows Support Tools.9. From Command Prompt change directory to C:\Program Files\Support Tools.10. Type Adsiedit.msc11. Navigate to CN=Active Directory Connections, CN=Microsoft Exchange, CN=Services, CN=Configuration, DC=<Domain Name>, DC=Com.12. Look for any ADC policies.13. If any policies exist, then delete the ADC policies. Note: On the safe side, please perform a System State Backup of the DC. Hope it helps. Xiu

It worked... Thanks for the help...I was pulling my hair out trying to find that trace of the ADC. You saved me a lot of headace.

It's my pleasure.

Does this include deleting the "Default ADC Policy" (under Sites and Services & using adsi)? That is the only policy I show listed, and yet I receive the same Exchange 2007 install error. Thanks

Another solution that's worked for me:Situation: Server A is listed as having the ADC installed, but the ADC isn't listed as installed and doesn't show up on the Services listSimple Solution:- Install the ADC on that server- Uninstall the ADCI had no problem installing Exchange 2007 after doing that. NOTE: This may not work in all cases. If that's the case, then you'll need to refer to the ADSIEdit instructions given above.

apologies for bringing up an old post - I have a similar issue reported by BPA but only after the install and it didn't prevent me from doing the install. My reference is to a server that has been gone at least 3 or 4 years. If I delete the policy do I also need to delete the config_CA_Companyname_OLDServername, Two-Way Public Folder Connection Agreement and Two-Way Recipient Configuration Agreement?I'm guessing so but wanted to double check. Is it also then safe to delete the CN=Active Directory Connections (which I guess I could do instead of all deleting all 4 individual settings?)

I had a similar issue when installing an Exchange 2010 server in an Exchange 2003 Org with this error message; One or more Active Directory Connectors has been found. Please remove all connectors before installing Exchange 2010. The issue stemmed from a DC which had an in-place upgrade from 2003 to 2008. The ADC connector was installed on the 2008 DC and could not be removed. Setup Failed with error The specified module could not be found Eventually resolved by ADSIEdit \Configuration \ Sites \ my Site\ My Server \ Exchange Settings and Delete the Active Directory Connector from this location.

Thanks Ed8870. Last one worked out for me.

If you want to install Exchange 2007 on a DC, you need Exchange 2007 SP3. Also, you should not install both in the same hardware. Not a good idea.