Second Exchange 2013 Server

Current Configuration:

1-Exchange 2013 server all roles mail is flowing; owa is working.

We're bringing on a large number of new users and I want to add a second exchange server.  I've tested a portion of this in a test environment and have successfully added a mailbox server, but not a second owa.  Because i've only worked with a single OWA, I'm struggling to understand the owa portion.  Always before I register the name and IP address with the DNS and it's a go.  With 2 OWA's, is it just a matter of listing both IP addresses in DNS internally and externally and then it works like a round robin?
tparrettAsked:
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Kash2nd Line EngineerCommented:
as far as I know, this is what you need to do.

1. Install second exchange server with mailbox role on it
2. add to domain
3. as it is going to be hosting boxes, i would think this should be handled automatically for you.
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tparrettAuthor Commented:
So do I understand that I should not setup 2 OWA's?  I thought it would be better to have 2 boxes running the OWA for a form of "load balancing".  I understand that it's not true load balancing, but somewhat similar.
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Kash2nd Line EngineerCommented:
Your query stated you want to add extra mailboxes to second exchange.
If you want to load balance then you might want to read here >>> http://www.msexchange.org/articles-tutorials/exchange-server-2013/high-availability-recovery/introducing-load-balancing-exchange-server-2013-part1.html
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Will SzymkowskiSenior Solution ArchitectCommented:
I would not recommend trying to leverage DNS as a load balancing solution. If you do not have a proper layer4 or layer7 hardware or virtual load balancer then I would recommend that you do not install the CAS role on the new mailbox server. Only installing the mailbox role will not create any issue and you would just create your databases and you are on your way. CAS role will be used on the other Exchange server.

However, it is recommended to load balance CAS so if you have the funds to get a true layer4 or 7 load balancer then install both CAS and MBX roles on the second exchange server and configure load balancing between them from CAS roles.

Will.
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Kash2nd Line EngineerCommented:
+1 to Will for H/W Load Balancer
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tparrettAuthor Commented:
Kash and Will your suggestions are invaluable.  Thank you so much.  To further explore Will's suggestion, if I would want to go with a h/w load balancer down the road should I install the CAS role and just not point to it until I get the H/W load balancer in place?  Would it be best to NOT install the CAS role until I have the H/W Load Balancer?  My biggest fear is I don't want to shoot myself in the foot when I bring this new server online by not thinking everything through.  

Again, thank you folks for your help!
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Will SzymkowskiSenior Solution ArchitectCommented:
Would it be best to NOT install the CAS role until I have the H/W Load Balancer

That is correct. Do not install CAS until you have a proper load balancer in place.

Will.
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