Hi again! I imported some mail-enabled contacts with CSVDE into Active Directory. But the entries do not replicate through our ADC, here is an example error message from the eventviewer: "The ADC cannot replicate CN=NAME,OU=OU NAME,OU=Contacts,DC=xxx,DC=xxx,DC=xxx. The site that the object belongs in is read only on the connected Exchange 5.5 Server. If another connection agreement can replicate this object to a 5.5 server in the correct site, then ignore this message. (Connection Agreement 'ADC_CA_NAME' #5084)" I verified the correct settings on the CA. I also checked if the mail addresses already exists in the organization. Furthermore I made sure that the contacts get valid addresses from the RUS. The contacts have all mandatory attributes as seen in KB275636. Why does the ADC not replicate these contacts? Greetings, Christian