upgrade exchange 2013 CU3 DAG to CU 7

Posted on 2015-02-20
Medium Priority
Last Modified: 2015-02-26
Hi All
 Im planning to migrate my Two exchange 2013 CU3 in DAG to CU 7, I plan to start in the passive server as its recommended my question is can I upgrade my passive server and keep it for 4 days before upgrading the active server,

Question by:ITMaster1979
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
LVL 14

Accepted Solution

Andy M earned 500 total points
ID: 40621082
Although in theory it should be possible I don't believe it's recommended to have both servers running different CU's for a large period of time as it could cause issues. If it was a difference between CU6 and CU7 I'd probably say it wouldn't be too bad but there's a large number of fixes between CU3 and CU7 - some of which may cause issues.

Personally I'd try to get both done as close together as possible. I recently had to upgrade ours to CU7 from CU6 but did encounter a number of errors when trying to do the passive first but once I upgraded the active/primary server the passive took the upgrade without any problems.
LVL 63

Assisted Solution

by:Simon Butler (Sembee)
Simon Butler (Sembee) earned 1000 total points
ID: 40621090
If you don't upgrade the second server to CU7 then you will be unable to complete failover.
So updating the passive will be fine. However if that server then becomes the active, you will be unable to fail back to the other server (with CU3) as you cannot failover to an older version.
What I usually do is failover the "primary" server, then patch it. Fail back and patch the previously passive server.


Author Comment

ID: 40621445
Ok so, my plan is to make sure that all the databases are mounted and active in the primary server, then patch the passive after putting it in maintenance mode, then move the databases to the passive and patch the primary , is that ok?
Get real performance insights from real users

Key features:
- Total Pages Views and Load times
- Top Pages Viewed and Load Times
- Real Time Site Page Build Performance
- Users’ Browser and Platform Performance
- Geographic User Breakdown
- And more

LVL 63

Assisted Solution

by:Simon Butler (Sembee)
Simon Butler (Sembee) earned 1000 total points
ID: 40621730
That should work fine. Remember that once you have failed over to the newly patched server you cannot fail back until it too has been patched.

LVL 44

Assisted Solution

Amit earned 500 total points
ID: 40621757
I assume you know how to move server into maintenance mode for such task. If not, check this.


Author Closing Comment

ID: 40632921

Featured Post

Office 365 Training for IT Pros

Learn how to provision tenants, synchronize on-premise Active Directory, implement Single Sign-On, customize Office deployment, and protect your organization with eDiscovery and DLP policies.  Only from Platform Scholar.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article will help to fix the below error for MS Exchange server 2010 I. Out Of office not working II. Certificate error "name on the security certificate is invalid or does not match the name of the site" III. Make Internal URLs and External…
Here's a look at newsworthy articles and community happenings during the last month.
how to add IIS SMTP to handle application/Scanner relays into office 365.
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
Suggested Courses
Course of the Month14 days, 2 hours left to enroll

800 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question