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Exchange without Clustering Redundancy

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Last Modified: 2017-04-21
Hey Guys,

We have Exchange in house, we are a small organization. We are looking for some sort of option in case our Exchange server goes down to send/receive email. I know clustering is out there, but we'd rather go with something less complex to set up and maintain. Any thoughts?
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Systems Infrastructure Engineer
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Thanks for that feedback. Maybe i can look into that. Is there a way to use both (on prem w/0365) and use the other for DR?
Schnell SolutionsSystems Infrastructure Engineer
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Not exactly, what you can do is to connect your Exchange On-Prem with Office365 and you can move your users between both environments. It is not going to be a DR, but you can have some of your users On-Prem and other users on the cloud. If your On-Prem server fails, these local users are going to be without service, and the ones in the cloud will continue working normally.

If you want to use a DR you can use one IaaS solution, such as Azure. But it will add you extra overhead (Replication to a VM in the cloud, recovery scenarios design/configuration, etc). But it is also an option. (i.e. Replicate your entire Exchange to a VM in Azure, and if something happens to your local server you use your replica on the cloud. In this example you might require a site to site vpn connection between your LAN and Azure, and configure some routes for your internal network, that is why it requires additional overhead. Nonetheless, Exchange is not friend of replicating its information without the application being aware of it).

Author

Commented:
Man that wouldve worked if i could somehow move the local mailboxes to office365 and vice versa as needed. Disappointed they dont have that yet...
Schnell SolutionsSystems Infrastructure Engineer
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you can make that. Move mailboxes between one platform and another as needed. What I mean, is that at one specific time each user is at one site or another. It is not that if users A, B and C are right now On-Site, and the On-Site server fails, that they will be moved to O365 like a failover or similar solutions. In such a case the users are going to be without service, there are indirect ways for moving the users to O365 under such circumstances, but that is not the intention and you will have many challenges... move the mailbox without its last data, merge the information of the two mailboxes after this change, etc.

But it is true that you can move users as needed between both platforms at any time. (When the On-prem service is online)

Author

Commented:
So I can move them back and forth, that's good. But say user A is on site currently, and on site fails. Is there a way for user A to at least just get "new emails"

Author

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Is there something that can "hold" the emails that will let me view and possibly even respond if 0365 is down?
Schnell SolutionsSystems Infrastructure Engineer
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Commented:
What do you mean?

The emails that come from the outside they are going to be retained in O365, and when you have your server back online, they are going to be received.
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