Microsoft Exchange Server using Microsoft Exchange ActiveSync is common place, but in most cases you need to lock your phone with a pin or password when adding a work email account. I am one of those that hates to have my phone locked so it was the Nine email and calendar app to the rescue. The Nine Android app allows you to do security on the app screen and eliminating the need to lock your entire phone.

Nine offers a free trial for 2 weeks. After trial the Nine license is $14.99. (Worth every penny) Do the trial and see for yourself.

About
As of today email communication became a critical thing as interpersonal communication skill within an organization or in your daily life. There might be nothing more important than efficient communication in the work of a company. Nine is a full-fledged email application for Android based on Direct Push technology to synchronize with Microsoft Exchange Server using Microsoft Exchange ActiveSync, and also designed for entrepreneurs or ordinary people who want to have efficient communication with their colleagues, friends, ‎and family members at anytime, anywhere. You may already have good experience with other E-Mail apps for Android. Regardless of your existing experience, we will give you a superb experience more than anything else. Leveraging E-Mail, Contacts, Calendar, Tasks and Notes on your mobile devices through wireless networks enhances your user experience and dramatically reduces your time.

Key features
– Direct Push Synchronization with Exchange ActiveSync. Nine does not have any server to store user’s Nine data. Nine app connects to user server directly. All Nine data is stored in user device only.
– Great user experience & beautiful GUI
– Multiple accounts
– Calendar and Contacts (Integrated into stock Calendar and Contacts application along with Nine account)
– Rich-Text Editor
– Client Cert
– S/MIME
– IRM
– Global Address List (GAL)
– Select folders to push (Email notification per each folder)
– Automatic setup for many popular email services like Office 365, Exchange Online, Hotmail, Live.com, Outlook, MSN or Google Apps
– Full HTML (inbound, outbound)
– Secure Sockets Layer (SSL)
– Hybrid Email Search (Integrate with fast local search and online search)
– Conversation Mode
– Unread Badge (Nova Launcher, Apex Launcher, DashClock and Samsung, Sony, Huawei & LG devices)
– Widgets (Unread badge, Shortcuts, Email list, Tasks list and Calendar Agenda)
– SMS sync​ (Exchange 2010 and higher)
– Supports Android Wear
– Notes Sync (Exchange 2010 and higher)
– Tasks & Calendar Sync
– Modern Authentication for Office 365
– Entrust SmartCredentials
– Samsung DeX