Validating that the servers contain only signed drivers
For more information about how the Microsoft Exchange Transport service selects certificates for Transport Layer Security (TLS), see the following topics: This error is an informational status message.By default, the certificate that installed with Exchange Server 2010 is self-signed.
This status message indicates that the Microsoft Exchange Transport service was unable to validate the certificate chain, or that the public key that was used to validate the certificate signature is not the correct key.
It's generally a best practice to use certificates from trusted third-party certification authorities (CA).
For more information, see Using PKI on the Edge Transport Server for Domain Security.
Use the following sections for more information about how to manage the driver catalog in Configuration Manager: As part of the import process for the device driver, Configuration Manager reads the provider, class, version, signature, supported hardware, and supported platform information that is associated with the device.
By default, the driver is named after the first hardware device that it supports; however, you can rename the device driver later.