iOS 5 lets you sync local calendars (and local contacts) from your desktop PC or Mac via iTunes if you connect the device via a USB cable or Wi-Fi — or over an Internet connection via a free iCloud account. That way, you can get your Outlook or Address Book contacts into your device easily and even keep them in sync with your iPad, iPhone, or iPod Touch. Server-based contacts (and calendars and email addresses) are of course synced through the relevant server: Exchange, Google, and so on.
It’s easy to navigate through your contacts in iOS’s Contacts app: Jump to names by tapping a letter at the side of the screen, such as “T” to get to people whose last names begin with “T.” Or search quickly for someone in the Search field by typing part of the name.
When creating address information, Contacts provides dozens of fields you can use. You can also assign custom ringtones and custom vibrations to each contact. But iOS’s Favorites capability is limited; you can designate a person’s specific contact info — say, a phone number or email address — as a favorite, which puts it in the Favorites list in the iPhone’s Phone app (if a phone number) or FaceTime app (if an email address). That’s it.
iOS 5 covers all the major bases for business communications: It can connect to multiple Exchange, IMAP, POP, and Gmail accounts; make and synchronize appointments; and manage contacts. It tries to autodetect your mail server settings wherever possible and does a good job of handling nonvanilla settings. There’s a client app for Lotus Notes, and you can access GroupWise if you install its Exchange-compatible server add-on.