How to Install Cumulative Update (CU) for a 2 Nodes DAG (Exchange 2013/2016)

Hello,

I notice this last few weeks, a lot of Exchange admins are searching & Requesting information how to install CU on Production Server. First reason, for this High quantity of request is mainly because customer is plaining or are in Hybrid Mode. While your are running a Exchange with HCW, Microsoft recommend to have at least the last CU or the one before installed. So customer need now a good procedure to safely install CU on their production Exchange Servers.

So please find a quick guide\Procedure I have created to assist you in this CU installation.

PS: all my scripts are tested on my lab so please test the script before applying to production.

The procedure is:

  1. Requirements
    1. Prepare AD for Schema Update – Link
    2. Please be aware of this second way of check for Schema update – Link

  2. Patch Node1:
    1. Update the HLB configuration to redirect traffic to Node2
    2. Put Node 1 in Maintenance mode
      1. Use the attached Script – Link
    3. Install Cumulative Update
    4. Reboot the Exchange Server
    5. Remove Node 1 from Maintenance Mode
    6. Run validation Tests on Node1
      1. Check OWA
      2. Check Outlook connectivity
      3. Check Mail flow
  3. Patch Nod2:
    1. Update the HLB configuration to redirect traffic to Node1
    2. Put Node 2 in Maintenance mode
      1. Use the attached Script – Link
    3. Install Cumulative Update
    4. Reboot the Exchange Server
    5. Remove Node 2 from Maintenance Mode
    6. Run validation Tests on Node1
      1. Check OWA
      2. Check outlook connectivity
      3. Check Mail flow

I hope this will help.

John

Feedback are welcome

How to check Exchange Attribut change using Repadmin while install Exchange CU

:

Hello,

I have created a procedure (with a Powershell script – Link ) to install a CU on your exchange server. I have notice in complexed AD environment , the powershell script may fail.

So please find a second way using a old tools Repadmin:

  1. repadmin /showattr * “CN=Microsoft Exchange,CN=Services,CN=Configuration,dc=Company,dc=com” /atts:objectVersion
  2. repadmin /showattr * “CN=ms-Exch-Schema-Version-Pt, CN=Schema, CN=Configuration,dc=Company,dc=com” /atts:rangeUpper
  3. repadmin /showattr * “CN=Microsoft Exchange System Objects,dc=Company,dc=com” /atts:objectVersion

Which CU is updating the Schema and\or AD:

  1. Exchange 2013: https://technet.microsoft.com/en-us/library/bb125224(v=exchg.150).aspx#ADversions
  2. Exchange 2016 : https://technet.microsoft.com/en-us/library/bb125224(v=exchg.160).aspx#ADversions

PS1 – Maintenance mode for Exchange 2013 & 2016

Hello,

Please find a nice script I have wrote to assist with the installation of Cumulative update on Exchange 2013/2016.

The script is following the both Technet procedures:

  • Exchange 2013: Link
  • Exchange 2016: Link

Please do not hesistate to let me know what you think about the script?

Script:Exchange 2013 Maintenance Mode

PS: Please test the script before applying to your environment.the script is provide as it is.