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Data Migration Outlook 365 to G-Suite

Michaela Langley 0 Reputation points
2023-08-26T00:29:04.37+00:00

I am trying to bring our old email data over from Outlook 365 to google workspace. I keep getting this error: Exchange Impersonation error. Unable to open user mailbox due to impersonation error. Please make sure impersonation is set properly. (11021)

Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Kael Yao-MSFT 37,676 Reputation points Microsoft Vendor
    2023-08-28T01:59:10.8666667+00:00

    Hi @Michaela Langley

    Have you assigned the required permission in Exchange Online admin center?

    For more details please refer to this similar thread:

    Exchange Impersonation error. Unable to open user mailbox due to impersonation error. Please make sure impersonation is set properly. (11021)

    The general steps are:

    1. Log into to ECP e.g. https://outlook.office365.com/ecp
    2. Select the Permissions menu, then Admin Roles
    3. Create a new role by clicking on the + sign
    4. Give it a name e.g. GSuiteMigration
    5. Click on the + under roles and add the ApplicationImpersonation & ViewOnly-Configuration
    6. Click the + sign under members and add the admin that requires the impersonation role
    7. Save and rerun the migration steps

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