When using Migrator for Notes to Exchange (MNE) to Prepare local Active Directory accounts for Azure AD Connect, you may experience the following error:
15:55:26 ERROR: [7429-1-52-8007200D]Unable to create mailbox for 'CN=User1,OU=Users,DC=DOMAIN,DC=COM'
15:55:26 SetInfo:
15:55:26 [8007200D] The specified directory service attribute or value already exists.
15:55:26 Source: Active Directory
15:55:26 Description: The specified directory service attribute or value already exists.
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