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Hybrid Exchange Migration.

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Hi All,

        I am in the middle (maybe nearing the end) of a Hybrid connection from a single Exchange 2010 server.  I am not planning on setting up ADFS for this client and am needing to sync up about 9 domains with one of these domains Schwartz.net.au being the primary.  I have ran the on premise hybrid configuration wizard for the single domain Schwartz.net.au and this seems to have completed successfully.  I have been able to create a new on MS Online mailbox from the On Premise EMC and this synced up to the portal correctly.

 

I have setup lync DNS and almost completed the mail DNS records, so far they are verified in the online portal and some were verified in the EMC Hybrid Wizard.

 

Now I have a few questions the first one is as follows.  How can I confirm that mail will get delivered via O365 to the on premise mailboxes after I make the DNS change.  I cannot afford to loose connection at any time for the clients mail. 

 

Here is what I do know.  I have two DNS records to go for the first domain.  They are:

 

MX 0 @ schwartz-net-au.mail.protection.outlook.com 1 Hour

CNAME - autodiscover autodiscover.outlook.com 1 Hour

TXT @ v=spf1 include:spf.protection.outlook.com -all 1 Hour

 

If I make this change straight away how can I confirm that things will keep working as normal.  I have done a telnet test to schwartz-net-au.mail.protection.outlook.com and it is accepting the connection for the domain so things seem ok there.  And I see in the Forefront that the message was accepted but was detected as spam which makes sense as shown below:

 

 

So it would appear after the DNS changes above the messages would come into the Forefront and then get delivered OK.

 

Am I correct here?

 

The second question is on mailbox moves but I will wait until after this bit of guidance.

 

Thanks in advance of any advice.


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