Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


Exchange 2010 Automatic Failover on Send Connectors

Posted on 2014-03-31
Medium Priority
Last Modified: 2014-07-13
Hi All,

We have a 2 node DAG/CAS setup that uses loadbalancers for client access.  We did a test shutdown of our primary site the other day and everything went well apart from the outbound SMTP.

What I did was setup 2 send connectors, connector A and connector B.  These 2 send connectors both go to our smarthost at Messagelabs.  Connector A has a cost of 1 and is assigned to server A.  Connector B has a cost of 100 and is assigned to server B.  My thinking was that should server A fail it will automatically failover to connector B.  Unfortunately it seems that Exchange has no way of doing this.  Obviously if I manually disable connector A it all starts working on connector B.  So how do I achieve automatic failover on SMTP outbound?  Surely people don't all do this manually?

Any help greatly appreciated!

Question by:robclarke41
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
  • 3
  • 2
LVL 13

Expert Comment

ID: 39966322
Delete send connector B, leave only one. Add for it as source server both of your servers: server A and B.
When site A is down and no connection between site A and B, after failover, messages should be routed by server B to your smart host server.
Of course internet connection should be available on site B.

Author Comment

ID: 39966329
But I want all mail to go through server A not server B (unless server A fails).  I did look into this method and I couldn't see a way of specifying the order in which they were used?
LVL 13

Expert Comment

ID: 39966336
As I understand Site B is let's say passive, therefore no traffic should go thought it or you have users on it with mailboxes? If site B is used only for DR failover, no traffic should go to it while all users are in site A.
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!


Author Comment

ID: 39966489
Sorry I should say that my sites are only divided geographically, not by AD or subnet.
LVL 13

Expert Comment

ID: 39966508
Well in this case if are the same site in AD, you can't do nothing. Just keep 2 send connectors for each "site" with proper hub servers inside and in case of failover activate the second one.
LVL 63

Accepted Solution

Simon Butler (Sembee) earned 2000 total points
ID: 39966788
Just to echo above - Exchange is AD site aware, that is why you have no control. It is expecting you to have your AD sites and services configured correctly.

If you have servers in two different locations then you really should have then in two different AD sites. Exchange will treat the servers as being equal otherwise. That could mean you have a user sending an email to someone sat next to them which is routed via the server in the second site. You could also have Autodiscover traffic going to the second location as well as authentication traffic. If you reboot a domain controller you could find that your Exchange server starts using a remote DC instead.


Featured Post

Free Backup Tool for VMware and Hyper-V

Restore full virtual machine or individual guest files from 19 common file systems directly from the backup file. Schedule VM backups with PowerShell scripts. Set desired time, lean back and let the script to notify you via email upon completion.  

Question has a verified solution.

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

Know the reasons and solutions to move/import EDB to New Exchange Server. Also, find out how to recover an Exchange .edb file and to restore the file back.
On September 18, Experts Exchange launched the first installment of the Help Bell, a new feature for Premium Members, Team Accounts, and Qualified Experts. The Help Bell will serve as an additional tool to help teams increase question visibility.
In this video we show how to create an Accepted Domain in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Ac…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

670 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