Moving from on-premise to hosted exchange?

No doubt we will be moving to this at some stage, however are there any issues is should be aware of before committing, like integration of existing on-premise systems etc?

Do they give you a clean server (so to speak)?
or does the hosted partner configure things like DAG, SSL certs etc..?
What options do we have around backup, space etc?

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If you go for the official MS services (Either Exchange Online or Office365), everything is taken care of (backup, archiving, SSL, load balancing etc)
There's no clean server to speak of, it's all handled as a cloud service. You only administer your domain through the exchange/office365 admin web page, or through some Powershell commands. There's no cert/DAG's to take care of. It "just" works.

If you decide for a third party, I can't tell you anything useful. Some are equal in expertise, some are not. Some even charge you more than you would directly from MS.
Directly from MS, you do NOT need any contact with any person. Everything, including billing and upgrading licenses, is done through the admin page. The backup might be the only issue though. There's no real backup against deleting by yourself. The backup means that you're assured nothing gets lost in case of a server error at MS side.
The backup you ran on your on-premise Exchange, probably had brick level restoration of messages, in case the user deleted their own email. That kind of service is not included.

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CHI-LTDAuthor Commented:
real email as a service then..
Is that a comment or a question? I don't really understand.

If you mean I forgot to tell you about integration, there is some:
CHI-LTDAuthor Commented:
useful link, thanks
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