When migrating from a source IMAP server [CoreMail] to Office 365 using On Demand Migration for Email (ODME), we want to know if you have seen any issues migrating email items from the folders that has "Missing UIDNEXT". This is something to do with RFC 3501 non-compliant message type. Will ODME be able to migrate this type of content or have you seen similar type of behaviour in the past?