Easy info about LineageOS 14.1 features not working in 15.1 (e.g. Exchange)?

More things:
-My IMAP account, from the stock email app, was not migrated
-My main adressbook was not migrated, it was empty! Interesting: I needed more than a day to notice that :rofl: (no I have no cloud-sync, resynced it with MyPhoneExplorer once I was home again)