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Is there any prepared task plan ?
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Hi ucguy....<br />
This is a very common issue, you can easily update cu6 having 3 mailbox server &amp;&nbsp;3 CAS server. <br />
The Link given below shows you the simplest way for updating cu6.<br />
<br />
<a href="http://msexchangeguru.com/2014/08/28/e2013cu6installation/" rel="ugc">http://msexchangeguru.com/2014/08/28/e2013cu6installation/</a>
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Hi ucguy....
This is a very common issue, you can easily update cu6 having 3 mailbox server & 3 CAS server.
The Link given below shows you the simplest way for updating cu6.

http://msexchangeguru.com/2014/08/28/e2013cu6installation/ [http://msexchangeguru.com/2014/08/28/e2013cu6installation/]

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Its exchange 2013.<br />
We are having 3 Mailbox Serves and 3 CAS servers. One CAS and one Mailbox at DR site as well. &nbsp;There is DAG.<br />
<br />
How can we update CU6 ? what will be the best practice ?
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Its exchange 2013.
We are having 3 Mailbox Serves and 3 CAS servers. One CAS and one Mailbox at DR site as well.  There is DAG.

How can we update CU6 ? what will be the best practice ?

Updating Exchange 2013 Cu6

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

Microsoft applications include a variety of software programs, including development and digital authoring programs (Expression and Media Center), educational programs, Internet software, including Essentials, Skype and the Live family, anti-virus, productivity applications and suites like Office, Excel, Word, Outlook, Access and PowerPoint, video games and server applications such as Exchange, SharePoint, IIS and Virtual Server.