ActiveSync Tester Diagnostic

Diagnosis - It is not possible to establish communications to the Exchange server.
The ActiveSync Tester has been unable to communicate with the Exchange server. Possible solutions are listed below.

Communication Error Analysis

  • Failed to resolve the DNS name.The Exchange server name entered is not valid. Enter the correct name or the IP address of the Exchange server.
  • Failed to connect to the server. [Connection Refused] Verify that IIS is running on the Exchange server and configured to accept connections.
  • Failed to connect to the server. [Connection reset by server] View the IIS logs on the Exchange server to find the reason why the connection was reset.
  • Failed to connect to the server. [Host unreachable] Use a Ping command to verify that the Exchange server is running.
  • Failed to connect to the server. [Timeout] Check that there are no personal or server firewalls between the test machine and the Exchange server.
  • Failed to connect to the server. [Network unreachable] The Exchange server is on a network that is not reachable from the test machine. Verify (using ping) that the DNS entry for the server resolves to a routable address.
  • Failed to connect to the server. The ActiveSync Tester was unable to establish a TCP connection to the Exchange Server. Ping the Exchange server to verify it is available on the network.
  • Failed to negotiate SSL with the server.The Exchange server may not have a certificate configured or a personal or server firewall is preventing SSL (port 443) traffic.

For more information on AccessMyLan and ActiveSync, consult the AccessMyLan Knowledge Base »

Disclaimer: All diagnostic and resolution information and associated links are provided as-is and AccessMyLan accept no repsonsibility for the accuracy or validity of any actions proposed. While feedback and suggestions are appreciated, we can not provide assistance to resolve generic ActiveSync configuration issues.