I would like to run the migration wizard without limiting the emails to 10MB. However when I enter regedit on me machine, under HKCU\Software\Zimbra\ there is no registry key for MaxAttachSizeMB.

I'm not all that familiar with changing settings in the Registry Editor. Should I just be creating a new entry of type REG_DWORD, with MaxAttachSizeMB as the name and a value of 0?

Thanks in advance for your help.