We help IT Professionals succeed at work.
Get Started

DAG with only two Exchange servers (over WAN)?

rr2r asked
Last Modified: 2012-06-22
We are thinking about setting up a DAG consisting of two Exchange machines, with one of them being located off-site with a decent WAN connection. We planned to have one of the serves at the main facility take over the witness role. The main goal is to be able to switch to the remote site in case the main server/network goes down, instead of using the other machine actively (unless that would be better).

With 2 servers down (out of 3), will the DAG even work if the main site goes down?
Will the switchover be automatic, or a manual process in that case?
And finally, how would the fall-back work (as I understand having 1 out of 3 DAG servers on-line will “break” DAG)?  
Watch Question
Solutions Architect
This problem has been solved!
Unlock 2 Answers and 3 Comments.
See Answers
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE