Office 365 email migration

You may follow these steps:

1. Perform this step-by-step guide to correctly put Office 365 side-by-side into your environment:

http://community.office365.com/en-us/w/exchange/786.simple-domain-sharing-for-smtp-email-addresses.aspx

2. Point MX records to Office 365 to make inbound mail flow directly to Office 365.

3. Remove the previous MX records to avoid any potential mail flow issues.

4. About your mailboxes left at Blue Host, you can either leave them as previous backups or just delete them because new mailboxes and mail flow are hosted at Office 365.

I hope it helps......

Thank you for your comment . Could you please advice, How is that possible to bring up the old mailbox to new office 365 environment ? Client need all mailbox and mail in office 365.

Also, Is it possible to rollback this change .

Thank you in Advance .

Regards,
J