Exchange 2010 failover of 2 Links

Question

Good Afternoon, Evevryone
I have the following scenario.
TMG as edge.
Exchange the internal network as
CAS, HUB and MailboxServer.
I do not use Exchange edge.
I have 2 internet link.
The external clients access Exchange
via OWAPP, Activesync,
Outlook Anywhere through webmail.dominio.com.br
name that points to one of my internet
IPs.
Well I would like to create one
failover. If the Link that
p falls webmail be redirected
to the IP of another internet link.
Is this possible?
I did a search and the only
thing I found was that we put the
TTL Host pointing (in my case)
webmail with at most 5 minutes.
If the link drop I change the
IP of the host webmail
for the other link is working.
There is no way to automate this? Remembering that it is
for OWAPP, Activesync,
Outlook Anywhere services.
To receive e-mail I use good old
MXs.
Fazzani - MCP, MCSA, MCTS-ISA,VISTA

Answer 1

HI 
YOu need to think of ISP failover in your case  if one line goes down second will  kick in. 
Or you might need to think of Adding an additional public IP address to the External DNS and pointing it to a cas server but still the load will be distributed equally to 2 ip's
You can try to accomplish this with TMG 
Similar thread for your reference
https://social.technet.microsoft.com/Forums/en-US/b0133ede-b198-4736-9edb-b7b9f82db5e2/how-to-publish-owa-anywhere-active-sync-in-case-of-dr
Remember to mark as helpful if you find my contribution useful or as an answer if it does answer your question.That will encourage me - and others - to take time out to help you Check out my latest blog posts on http://exchangequery.com Thanks Sathish
(MVP)