Configure Exchange server 2013 2 sites for internet resilency

I have 2 sites with Exchange servers on them. Each site has identical number of servers and roles on them! Both sites are connected via MPLS.

I would like to know if there's a possibility to configure Exchange with two different IPs on its Public autodiscover record on the Public DNS or use the SRV record with a different Public IP to point each IP to different data center?

The main purpose will be is in case one datacenter went totally off and no longer is accessible via Internet, users will still be able to access their mailboxes from via Internet from either site.

I know that this works for Hybrid integration between Exchange on-premises and Office 365. Users on Exchange on-premises can find their autodiscover settings on both environments.

I would appreciate any thoughts.
Thanks
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Mohammed HamadaSenior IT ConsultantAsked:
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Simon Butler (Sembee)ConsultantCommented:
DNS does not provide any kind of high availability.
Therefore while you can add both servers to the list of DNS records, if one site is down it will be luck that the users hit the server that is valid.
You could try adding in SRV records, the client should failover to them if the A record host isn't contactable.

The other option would be to use a cloud based load balancer.

Simon.
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Mohammed HamadaSenior IT ConsultantAuthor Commented:
Thank you Simon
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