Could you please let me know the Encryption method used for Exchange Email environment if it is 128bit or 256bit.

128 and 265 bit are examples of block sizes, not encryption types. Exchange uses a variety of encryption mechanisms and protocols to secure data. What is it that you are looking to understand? This article may be a good starting point: Understanding Client Access Security: http://technet.microsoft.com/en-us/library/dd298002.aspx I am being purposely vague with my response, because I don’t think a simple “128” or “256” will really help you here. J Mike Crowley Check out My Blog!

Exchange 2007/2010 can use TLS to encrypt the email traffic. The default outbound SMTP communication will be AES 128-bits with x.500 certificate Resources: TLS Functionality and Related Terminology in Exchange 2010 An update is available to adds support for the TLS_RSA_WITH_AES_128_CBC_SHA AES128-SHA and the TLS_RSA_WITH_AES_256_CBC_SHA AES256-SHA AES cipher suites in Windows Server 2003 TLS/SSL Cryptographic Enhancements James Luo TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.