@jackal2001 - Sorry for the confusion. We are trying to convey that RU10 is the last release which satisfies our mainstream support requirements for Exchange Server 2010. We will continue to ship security and time zone updates for Exchange Server 2010
on an on-demand basis during extended support phase. As part of our product planning, we expect to ship Time Zone Updates later this year which will be delivered in RU11 as part of our on-demand servicing. We expect RU11 to be the most current update when
Exchange Server 2016 releases and anticipate that this will be the co-existence supported version. As Exchange Server 2016 has not yet released, this requirement is subject to change.