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Exchange 2007 sync with Office 365 Identity Synchronization Error

    Question

  • Long story short, we have successfully migrated an Exchange 2007 to Office 365

    After all sync is completed, we are receiving an error report every thirty minutes. Below are specifics:

    Notes:

    - User shows as synced in the migration status

    - User used to have a space in the username (removed prior to migration)

    - NO errors at time of migration, just after

    - Checked ANSI attributes, all of the names are apparently correct.

    - Error can only be seen in error report we receive in an email

    - Office 365 Support was not able to determine the issue since it is likely related to AD

    - This is a user with a mailbox, mailbox is shared to other users. Setup was common to facilitate a simple way to share a common calendar.

    - Mailbox is licensed.

    ---------------------------

    Error:

    Identity                Error Description             sourceAnchor  

    Username@DOMAIN.com          Unable to update this object in Azure Active Directory, because the attribute [Username], is not valid. Update the value in your local directory services. WCwOnyYOyUSWe516q3RCBw==    

    Username@DOMAIN.com Unable to update this object in Azure Active Directory, because the attribute [UserPrincipalName] with value Username@DOMAIN.com is already used by another object and it must be unique. Update the value in your local directory services.              Z56/qSWMgk6tdBbpbjmzXQ==

    Username@DOMAIN.com Unable to update this object in Azure Active Directory, because the attribute [UserPrincipalName] with value Username@DOMAIN.com is already used by another object and it must be unique. Update the value in your local directory services.              tvNk+WTmXUK5/d0JcwGrPg==

    Username@DOMAIN.com Unable to update this object in Azure Active Directory, because the attribute [UserPrincipalName] with value Username@DOMAIN.com is already used by another object and it must be unique. Update the value in your local directory services.              CwJmxT7eC0q4PRoklAGrqA== 

    Username@DOMAIN.com          Unable to update this object in Azure Active Directory, because the attribute [UserPrincipalName] with value Username@DOMAIN.com is already used by another object and it must be unique. Update the value in your local directory services.              Username@DOMAIN.com Unable to update this object in Azure Active Directory, because the attribute [UserPrincipalName] with value Username@DOMAIN.com is already used by another object and it must be unique. Update the value in your local directory services.                d4Y5ykoZrEmGo3iyEAbdKg==   

    Wednesday, March 22, 2017 5:22 PM

Answers