This section describes how to upgrade Exchange Server 2010 to any 2010 service pack. It is applicable only if you already have Exchange 2010 setup in an InfoScale environment.
Before you proceed to upgrade to a service pack, ensure that you have met all the necessary pre-requisites for installing the service pack on all the cluster nodes where you are upgrading Exchange.
For details refer to Microsoft documentation.
To upgrade Exchange 2010 to a service pack
hastop -local -force
You can install the service pack parallel on all the nodes, where you are upgrading Exchange. In case of disaster recovery, you can simultaneously upgrade both the sites.