Please check in Active Directory that an account named "SPAMfighterService" is created, and that it a mailbox has been created in Exchange for the account.The user account needs to be member of the following usergroups:Administrators Exchange Servers Organization ManagementGo on your server to "Start" -> "All programs" -> "SPAMfighter Exchange Module" -> "Configuration" -> "Exchange Integration Manager".Click the "Service status" tab. Click the button next to "Stop SPAMfighter Exchange Module service".Click the "Service account" tab. Make sure that the name of the user account "SPAMfighterService" is written correctly. Enter the password correctly. Make sure that the proper domain is selected. Then click the "Confirm" button.Go back to the "Service status" tab and click the button next to "Start SPAMfighter Exchange Module service".Then go to the "Integration" tab and click the button next to "Remove integration into Exchange", then click the button next to "Add integration into Exchange".If you still have difficulties, please use the support form to contact the support team.