(…)
(cf note 1)
Benjamin
Description: Product: Microsoft SQL Azure Data Sync Preview -- Error 26405. Failed to grant 'logon as service' rights to user. (-2147023564 .\localSqlAsync ) (…)
To work around this, you can Start, Run, gpedit.msc, then you’ll be able to add the account to the logon as a service user right assignment here: