Powering The Shell

1. Download the Cumulative update for Exchange 2013.
2. For the update of Exchange server 2013 CU 1-6, AD Schema needs to be extended. For update of Exchange 2013 CU 6 and later, the following steps 3-6 is not required.
3. Open a command prompt, go to the folder with the CU and type

PackageName-KB12345-x64.exe /x:C:\abc\Unpacked

4.Prepare the AD Schema.

setup.exe /PrepareSchema /IacceptExchangeServerLicenseTerms

5. Prepare AD.

setup.exe /PrepareAD /IacceptExchangeServerLicenseTerms

6. Prepare the domain.

setup.exe /PrepareDomain /IacceptExchangeServerLicenseTerms

Mailbox servers in the DAG should be updated first.

For Mailbox servers in the DAG, the following steps should be followed:
1. Suspend the DAG member by running the command

Suspend-ClusterNode –Name 

in EMS. 

2. Disable database copy activation.

Set-MailboxServer  –DatabaseCopyActivationDisabledAndMoveNow $true 

3. Check the existing database copy auto activation policy.

 Get-MailboxServer  | Select DatabaseCopyAutoActivationPolicy

4. Set the auto activation policy to “Blocked”

Set-MailboxServer  –DatabaseCopyAutoActivationPolicy Blocked  

5.Bring the server into maintenance mode.

Set-ServerComponentState   –Component ServerWideOffline –State InActive –Requester Maintenance 

6. Run

Setup.exe 

for the gui installation or

setup /m:upgrade /IacceptExchangeServerLicenseTerms

for the unattended installation.This should take around 45 minutes per DAG mailbox server.
7. After setup is complete, bring the server out of maintenance mode.

Set-ServerComponentState  –Component ServerWideOffline –State Active –Requester Maintenance

8. Resume the DAG server.

Resume-ClusterNode –Name 

9. Set the database copy auto activation policy which was existing previously as per step 3.

Set-MailboxServer  –DatabaseCopyAutoActivationPolicy Unrestricted

10. Enable database copy activation.

Set-MailboxServer   –DatabaseCopyActivationDisabledAndMoveNow $false

11. Activate the Hub Transport role.

Set-ServerComponentState  –Component HubTransport –State Active –Requester Maintenance  

For CAS(Client Access) servers, the following steps are to be followed:

1. Bring the server into maintenance mode.

Set-ServerComponentState   –Component ServerWideOffline –State InActive –Requester Maintenance 

2. Run

Setup.exe 

for the gui installation or

 setup /m:upgrade /IacceptExchangeServerLicenseTerms

for the unattended installation. This should take 15-30 minutes.

3. After setup is complete, bring the server out of maintenance mode.

Set-ServerComponentState –Component ServerWideOffline –State Active –Requester Maintenance

In case of issues, please review the excellent article by Paul Cunningham @ExchServPro

http://exchangeserverpro.com/exchange-server-2013-upgrade-fails-due-to-receive-connector-conflicts/