en-US Home > Categories > Microsoft Outlook 2016 > MIME to MAPI Conversion MIME to MAPI Conversion 5 Group Policy settings under MIME to MAPI Conversion. Browse the sub-folders and settings below. Settings Change the limit for the number of characters in Friendly Name Change the limit for the number of MIME body parts Change the limit for the number of MIME headers Change the limit for the number of nested embedded messages Change the limit for the number of recipients