Error Message

Failed to connect to the exchange serer. Exception The request failed. The request was aborted: Could not create SSL/TLS secure channel.

This can occur when the certificate installed on the exchange server is created using an algorithm that is unknown to the Merge1 server.

For example as some certificates are being generated using SHA512, Windows operating systems prior to Windows 2016 may have SHA512 disabled when using TLS 1.2.

See the below article for more details.

SHA512 is disabled in Windows when you use TLS 1.2 (microsoft.com)

A Wireshark focusing on the Client (Merge1) / Server (Exchange) server Hello can be used to provide further insight.

- Client Hello statement (Merge1 Server)

Note: The Client Hello shows the algorithms that the Merge1 server understands

- Server Hello statement (Exchange Server)

Note: The Server Hello shows the algorithm that the certificate present on the Exchange server is created with.

Ensure that the Merge1 server supports the appropriate algorithm used to create the certificate on the exchange server. 

Contact Veritas Technical Support for additional assistance