How to patch and upgrade to latest RU RRS feed

  • Question

  • Exchange Server 2007 2 node cluster is a single copy cluster, currently on Exchange 2007 sp3 RU4 (version 8.3 Build 83.6). With presented iSCSI storage from Netapp and ZFS. We also have two CAS servers and two UM servers. I'm downloading RU18 to each exchange server.


    1. How do I patch/upgrade RU for my Exchange environment without disruption

    2. Do I have to upgrade to latest RU18 for my CAS and UM servers as well

    3. Is there any particular order for updating

    Thursday, March 3, 2016 2:41 PM


  • Hi,

    The order to upgrader your Exchange environment:
    1. Client Access Server (if you have multiple sites, internet facing sites first)
    2. Hub Transport
    3. Mailbox
    4. Unified Messaging

    Also, if you want to install update rollup in SCR environment, please refer to:

    Please make sure that you have valid backups of your servers, Active Directory and Databases before install updates.

    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.

    Allen Wang
    TechNet Community Support

    • Edited by Allen_WangJF Friday, March 4, 2016 3:22 AM
    • Marked as answer by Chicojr Monday, March 14, 2016 4:13 PM
    Friday, March 4, 2016 3:18 AM