. The three entries LastMDMMigratedBuild Build identifier Records the last iOS build associated with an MDM migration. MDM means Mobile Device Management, a system organisations can use to configure and manage devices. LastMigratedBuild Records the last build associated with a migration. It matches the MDM migration build recorded above. StopFilteringGrandfatheredRestrictions This is a Boolean setting. Its name suggests it controls filtering of older, existing restrictions. file system xml version="1.0" encoding="UTF-8"?> ANYTHOUGHTS OF WHAT THIS IS.