When Exchange 2013 was released it heralded a different servicing strategy compared to Exchange 2007 and 2010 Rollup Updates (RU). Exchange 2013 uses Cumulative Updates (CU) to deliver the servicing updates to customers. As previously discussed, a CU is a different animal when it comes to the update methodology. CUs are larger, cannot be uninstalled and are a full product installation. This was announced by the Exchange team on the blog.
Update: 11-12-2013: Updated post to reflect changes announced with Exchange 2013 RTM CU2
The original support statement was to allow for a period of three (3) months after the release date of the next CU.
When Exchange 2013 RTM CU2 was released, an update was announced. Customers will continue to receive assistance from Microsoft Support for the lifecycle of the Exchange server product - a customer is not required to be at the most current CU to receive assistance. There are two scenarios that to clarify though:
The table below is based off the Exchange 2013 release dates TechNet article. The intent is to show when an Exchange 2013 build was released and the availability of security updates.
The Microsoft lifecycle site is available to indicate the release, Mainstream and extended support dates for Exchange 2013.
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Good link Rhoderick , It also provides all other Microsoft product in the Product Life cycle Search link. Very Much Helpful to plan our future infra cycle design