Achtung, ist nicht die Abschaltung[HKEY_CURRENT_USER\\Software\Microsoft\Inbox\Settings]
"AttsOnCard"=dword:00000001
"SortOrder"=dword:00000001
"AddressFieldToSearch"=dword:00000000
"LeadChar"=dword:00000000
"AddLeading"=dword:00000000
"IndentBody"=dword:00000000
"SMSDeliveryNotify"=dword:00000001 bewirkt, Rückmeldung vom Netz. SMS-Systemadmin: "Nachricht übermittelt"
"ReadHTMLMail"=dword:00000000
"SMSUnicode"=dword:00000000
"wizard"=dword:00000001
"SMSClass0MsgTitle"="SMS-Nachricht"
"CommaAsSeparator"=dword:00000001
"SMSAvailable"=dword:00000001
"SaveSent"=dword:00000001
"TrashEmpty"=dword:00000002
"MoveMessage"=dword:00000001
"IncludeOriginal"=dword:00000001
"ShowDateTime"=dword:00000001
"POP3MaxLinesToDownloadWithHeaders"=dword:00000005
"MsgClassOrder"="IPM.MMS,IPM.Note,IPM.SMStext,IPM.SI,IPM.SL,REPORT.IPM.Note.Status,REPORT.IPM.Note.DR,REPORT.IPM.Note.NDR,REPORT.IPM.Note.IPNRN,REPORT.IPM.Note.IPNNRN"
"MMSAvailable"=dword:00000000
...laut dieser Sammlung Registry-Tweaks und Tricks
http://www.xda-zone.de/thread.php?id=7398