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add domain to office 365

Hi all,

I’m planning to migrate my email to office 365.
I need to add my domains to verify them only now through office 365.
I need to ask whether is there anything will be change if I do the verification process for the domain? I mean the old configuration will be effected? Or nothing will happen?

Thanks
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ACS2012
Asked:
ACS2012
3 Solutions
 
Carol ChisholmCommented:
If you are going to move to a Professional P1 or P2 plan your DNS will be managed by Microsoft and once you verify the domain things will change. You just need to read the instructions carefully.

If you move to an Enterprise plan: E1, 2, 3 or 4, you can verify the domain but you have to make the changes yourself, at a time of your choosing. You need to know what you are doing...

You need to tell us how your domain is managed now, if you have Exchange servers, Active Directory Servers of it you just have a domain name at an ISP somewhere with POP mailboxes and forwarding.
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David Johnson, CD, MVPOwnerCommented:
I need to ask whether is there anything will be change if I do the verification process for the domain? I mean the old configuration will be effected? Or nothing will happen?

Yes your old domain will be affected since you will be changing the MX, SPF, Lync etc records so that o365 can verify them. Depending upon your TTL settings in your DNS it may take a while 24-48 hours for the changes to be available on all DNS servers worldwide.

You can revert back (if you have a saved copy of the older settings) but you still have to live through the TTL wait.
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ACS2012Author Commented:
I just have a domain name at an ISP somewhere with POP mailboxes and forwarding.
I have E3 plan.
I just need to verify my domains, nothing more, I’ll not change DNS or any other settings.
So still, if I’m doing the verification, anything will be changed in my old settings?
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David Johnson, CD, MVPOwnerCommented:
the verification process checks your mail settings.. ergo you have to change them.. see my original comment.
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Carol ChisholmCommented:
With E3 nothing changes automatically.

You create a TXT record in your DNS (which you can remove after verification)
MS checks the record is there - the TXT record is proof the domain belongs to you.
Then the domain is listed in Office365 as available for use.

It is only used by Office365 when you decide to change the DNS yourself.
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tonyperthCommented:
carolchi is correct, when you go to verify your domain there are two choices, either create an MX record (obviously you don't want to do that) or create a txt record.  Txt records are meaningless and change nothing so you should be able to do that to verify your domain without effecting anything.
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