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Exchange 2003 Migration to Office 365 - Mail stuck in on-premises queue

After migrating a user to the hosted cloud account, emails to this user are stuck in local queues.  This is a staged migration.  MX record still points to on-premises while migration process modifies ADSIEdit entry for user to temp domain in the cloud.
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footech
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Have you converted the mailbox-enabled user to a mail-enabled user with the .VBS script yet?
Is the targetAddress attribute set correctly for the user?  Should be something like "SMTP:user@domain.onmicrosoft.com".
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michaelalphi

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@footech - I'm not aware of the VBS , but ADSIEdit is showing the target address pointing to the x@x.onmicrosoft.com address.  

@michaelalphi - Thanks for the links.  I have looked through them briefly and will use them for some more troubleshooting.
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I ended up identifying two things that seemed to improve my situation. There were some public DNS server entries within the Exchange server configuration which I removed and the account that had been migrated had a forwarding rule with the check-box enabled for deliver to both email boxes.  I disabled this and email flow began to behave much better.

@footech - Thanks for the link to the VBS instructions.