mailbox migration issues routing address missing ???

dirkdigs 921 Reputation points
2021-03-06T05:45:58.427+00:00

I have 2 trouble mailboxes that will not migrate to exchange online for the life of me.... . i keep getting "Synced with Errors" message when trying to run the migration batch .the error says that the custom Microsoft domain/o365 routing address is missing from the mailbox i am trying to migrate .
I have gone into "attribute editor" and added and checked numerous times that the routing address does indeed exist and is present .
i have run numerous delta sync and initial sync but still getting the same error .
What can i do here? Check my screen shot . Cleary the routing address is present .

The target mailbox doesn‎'t have an SMTP proxy matching ‎'domain.mail.onmicrosoft.com‎'.

74916-2021-03-05-23-44-35.png

Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
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Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
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  1. dirkdigs 921 Reputation points
    2021-03-06T05:48:27.613+00:00

    here is the error74996-2021-03-05-23-47-19.png from exchange online .

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  2. dirkdigs 921 Reputation points
    2021-03-06T15:59:31.273+00:00

    well that was a dumb mistake !! DOH

    thanks,