Unfortunately, they're not listed in the order of occurrence but grouped by who sent the invitation.
6. Calendar: Schedule a conference room
One of Outlook's signature features is the ability to book a conference room for a meeting. There's no such feature in Calendar, but you can still book a conference room: Simply enter the room's name as an invitee; the Exchange server will book the room for you.
Also, you can see if the Exchange-managed conference room is free the same way you can check the status of any invitee.
7. Contacts: Merge duplicates
If you connect to several accounts such as Exchange, email, and iCloud, you'll likely have multiple entries for some people or for conference rooms. Contacts lets you link these multiple entries, so their information appears merged and your contacts list shows only one entry. I say "appears merged" because the data still resides across the various accounts, not copied across them or combined into a single account, but at least you get a unified view of all the accounts' information.
To link entries, tap one to open it, tap Edit, scroll all the way to the bottom, tap Link Contacts, tap the duplicate from your contacts list to merge, and tap Done. You can link multiple contacts, not only two; if you have more duplicates for the contact, keep linking them until they're all linked.
8. Notes: Password-protect notes
The ability to lock notes is new to iOS 9.3, which was released yesterday as a free update. But it's not at all obvious that the feature exists after you have installed iOS 9.3, much less how to use it.
First, you have to set the password to unlock the notes, which you do in the Settings app. Tap Notes, then tap Password to set the password that will unlock your notes. (You can also enable Touch ID to unlock them via your fingerprint, if you have a Touch ID-compatible iPhone or iPad.)
To password-protect a note in Notes, open the note, then tap the Share button. In the bottom row of options, you'll see a new one: Lock Note. You'll need to enter the Notes password or use Touch ID to actually protect the note. (Oddly, on an iPad you can't use Touch ID for the initial locking.) Once the note is locked, a lock icon appears at the upper right of the note; tap it, then Unlock Note to reveal the note's contents -- after you enter the password or use Touch ID, that is. The note stays unlocked until you lock it again, which you can do by tapping the lock icon.
Once an individual note has been locked, the lock icon lets you toggle between locking and unlocking that note. You need to use the Share button only the first time to lock a particular note. And you need to use the Share button to remove the lock completely from a note -- you'll see Remove Lock in its menu after tapping the Share button from within a note that has been previously locked.
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