Steps and procedure in Installing Exchange 2013 Cumulative Update on DAG environment ?

People,

I’d like to apply Exchange 2013 CU15 to all of my Exchange Server 2013 Standard Edition that is running DAG in three different AD sites (geographically).

This is the settings:

Each of these MBX servers running DAG with Lossless mode.

AD Domain: MyDomain.com

AD Site: Production 1
SITE1MBX1-VM [CAS & Mailbox]
SITE1MBX2-VM [Mailbox]

AD Site: Production 2
SITE2MBX1-VM [CAS & Mailbox]
SITE2MBX2-VM [Mailbox]

AD Site: Production 3
SITE3MBX1-VM [Mailbox]
SITE3MBX2-VM [Mailbox]

So how can I apply the Cumulative Update 15 safely without causing unwanted email flow or Outlook client outage in a 24x7 corporate environment?

After the CU15, I will need to install .NET Fx 4.6.2 to be able to run the CU18.

Thanks in advance.
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Senior IT System EngineerIT ProfessionalAsked:
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PRADIIP SINGHCommented:
Take the backup if config file and put the server in Maintanance mode and install it make sure you have to AD/Network connection is fine and pretty much it should be okay

And yes make sure the account the required permission on exchange
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Senior IT System EngineerIT ProfessionalAuthor Commented:
OK so how do I put the server into maintenance mode ?
what's the steps Pradeep.
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Senior IT System EngineerIT ProfessionalAuthor Commented:
OK, does the below script going to work or I missed anything that I must do:

Start maintenance script:
# Drainstop mail queue
Set-ServerComponentState SITE1MBX1-VM –Component HubTransport –State Draining –Requester Maintenance
Redirect-Message -Server SITE1MBX1-VM -Target SITE1MBX2-VM.domain.com

# Suspend the DAG member from the cluster.
Suspend-ClusterNode –Name SITE1MBX1-VM

# Disable database copy activation.
Set-MailboxServer SITE1MBX1-VM –DatabaseCopyActivationDisabledAndMoveNow $true

# Set the auto activation policy to “Blocked”
Set-MailboxServer SITE1MBX1-VM –DatabaseCopyAutoActivationPolicy Blocked

# Put the server into maintenance mode
Set-ServerComponentState SITE1MBX1-VM –Component ServerWideOffline –State InActive –Requester Maintenance

Open in new window

Exit maintenance script:
# Exiting the maintenance mode
Set-ServerComponentState SITE1MBX1-VM –Component ServerWideOffline –State Active –Requester Maintenance

# Resume the DAG member on the cluster.
Resume-ClusterNode –Name SITE1MBX1-VM

# Put the server into online unrestricted mode
Set-MailboxServer SITE1MBX1-VM –DatabaseCopyAutoActivationPolicy Unrestricted

# Enable database copy activation.
Set-MailboxServer SITE1MBX1-VM –DatabaseCopyActivationDisabledAndMoveNow $false

# Resume mail queue
Set-ServerComponentState SITE1MBX1-VM –Component HubTransport –State Active –Requester Maintenance

Open in new window

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PRADIIP SINGHCommented:
If you have download the script from the link I shared it's works like a champ
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Senior IT System EngineerIT ProfessionalAuthor Commented:
What about the database ? Do I need to manually failover the mailboxes DB to the other server and then executed the script ?

The script was from the Technet.
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PRADIIP SINGHCommented:
You can do that but usually script will take care if it but personally I feel doing manual failover it better
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Pradeep,

There is no manual steps apart from the scripting ?
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PRADIIP SINGHCommented:
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Thanks !
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