Outlook for iOS is still missing keypoints in the feature toolbox, so here is a little list of what Microsoft said during todays YamJam what is in the roadmap.
– Encrypted Email Support
– Join Lync Meeting Link
– Global Address List Searchable
– SharePoint Calendar Access
– OneDrive for Business
– Synchronize Contacts to native phone apps
– Notification when receiving mail to a subfolder
– Hide unwanted Connectors like OneDrive and Dropbox
– Restrict copy/cut/paste/save possiblity with Intune
– Intune/SCCM Selective Wipe/Retire Device
– Azure Rights Management Service Integrated
– Enforce Active Sync Policies like Pincode/timeout
Microsoft says they will update the App atleast every month, maybe even more.