Microsoft Outlook in a new Domain

I recently did a migration to a new domain. i migrated all users, documents, desktops, and email profiles over. However, now outlook is very slow to load and close, and for one user I can't even set it up. I have tried creating a new profile to link with our office 365 account, but that is not working either. I have run the office 365 setup software on his pc, but it still will not create the mailbox. At this point  am ready to re-install microsoft office altogether because I think it may have gotten corrupted. Also, please let me know about the speed of loading and unloading. thanks
nawright16Asked:
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Joseph NyaemaConnect With a Mentor IT ConsultantCommented:
Do you notice the slowness during peak hours?  How are speeds during offpeak hours?
Is your domains dns hosted by office 365 or by your registrar/isp?

If hosted by registrar/isp other than office 365, then to correct the account creation in outlook (assuming you are setting up on outlook 2013/2010SP2) ensure that the dns records are set correctly as in External DNS settings for Office 365
For Auto-creation of exchange profile, ensure that autoconfigure is setup correctly to point autoconfigure.office365.com.

Frankly it is easier to transfer your DNS hosting to office 365.  Of course I am assuming you haven't done this.  Speed issue I assuming congestion especially during initial sync, but depends on your answer to above.
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