New features summary
These are cumulative release notes. If a release does not appear in this section, then there were no associated new features and enhancements.

Email+ app features and enhancements
- Support for Author level permissions for delegated calendar: The Email+ app now supports Author level permission for a delegated calendar. With the "Author" permission the delegated user can create and read all items in the folder, and modify and delete items that are created by them.
- Email+ supports editor level permission added for delegated user: The Email+ app now supports "Editor" level permission.
- Reply, Reply All, and Forward options enabled for all delegated levels: Email+ app now supports Reply, Reply all, and Forward options for Delegated calendar events. For more information, see Delegated Calendar section in the guide.
- Delegate can Reply/Reply All/Forward delegated events with Classification: Delegate can Reply, Reply All, or Forward delegated events with Classification on behalf of the delegated calendar owner.
- Delegate can Reply/Reply All/Forward delegated events with SMIME: Delegate can Reply/Reply All/Forward to the delegated events on behalf of the delegated calendar owner with SMIME.
- Check availability feature now available for delegated events: The Email+ app now supports Check availability feature for delegated calendar events.
- Private events for the delegated calendar are shown in the Email+ app according to the Microsoft Outlook settings: For events marked as private, there is an option in Outlook to make them visible in delegated calendar for delegated user.
- Author and Edit level permissions for delegation: Delegated user with Author level permission is able to delete events in the owner calendar that were created by the delegate. A delegate with Author level can now edit events in the owner calendar that were created by the delegate. Delegate with Author level is able to create event or invite in the owner calendar.
- Improved performance for adding several delegated calendars in a row: Multiple delegated calendars with large data can now be added one after another.
Email+ administrator features and enhancements
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New value added: New value modern_mail_list added to enabled_features key-value pair to enable new refactored mail list. For more information, see Key-value pairs for customization Email+ for iOS (Cont.)

Email+ app features and enhancements
- Feature preview for Delegated Calendar:Upon adding the value calendar_delegation to the enabled_features key-value pair, the Add Delegated Calendar option is added to the Email+ 4.4.0 app. The Delegated Calendar supports the following features:
- Support for Delegated Calendar with Basic, Modern Authentication, and Certificate based authentication added: The Email+ app supports Delegated Calendar feature with Basic, Modern Authentication, and Certificate based authentication methods.
- Private events are hidden in delegated calendars: The Email+ 4.4.0 app does not display private events, and all private events in delegated calendar are hidden.
- Enabled delegated calendar event sync limit: The sync period for delegated calendar events is the same as for regular events. Events older than a month will not be synced to the Email+ app, all future events are synced.
- Email+ sends a notification when access to delegated calendar is canceled: When permission to the delegated calendar is removed, the delegated user receives a notification when the Email+ app is launched.
- Different views for delegated calendars and regular calendar events: The events from delegated calendars are displayed overlaid along with events from the main calendar in different views.
- Email+ supports reviewer level permissions to the delegated user: The delegated user can view event details with the reviewer level permission. Currently, Email+ 4.4.0 supports only 'Reviewer' level permission. All other permissions levels are represented as 'Reviewer' in Email+.
- Different color code for main calendar and delegated calendar: The user is able to adjust calendar colors to differentiate between the main and delegated calendar.
- Support to remove delegated calendar: A delegated user can remove the delegated calendar from the Email+ app.
Currently, these features are disabled by default. The admins can enable the feature previews by configuring the calendar_delegation value for enabled_features key-value.
- Ignore disabled richtext_event_support if calendar_delegation is enabled: The Event notes are always displayed in HTML when calendar delegation feature is enabled. If richtext_event_support flag is added to disabled_features and calendar_delegation is added to enabled_features, then richtext_event_support flag is ignored.
- Support for modern_sync_engine enabled: Support for modern_sync_engine key-value pair is enabled by default.
- Draft folder renamed: The "Draft" folder in the Email+ app is renamed to "Drafts".
Email+ administrator features and enhancements
- New value added: New calendar_delegation value added to the enabled_features key-value pair to enable Add Delegated Calendar option in the Email+ app.
- New value added: The modern sync engine can be disabled by adding the "modern_sync_engine" value to "disabled_features". The eas_16, calendar_delegation, and modern_mail_list features will become unavailable.
- Required key-value pairs to enable calendar delegation: The ews_min_allowed_auth_mode and email_ews_host are required to enable the calendar delegation.

Email+ app features and enhancements
- Support Suppress Name Check on certificate mismatch (S/MIME): The Email+ app now associates the certificate with the senders email address for signed mails. When the Email+ app receives an email signed with a certificate, where the email address or domain differs from the sender's email address, the Email+ app associates the certificate with the sender's email address, so that Email+ app can use the certificate when sending encrypted emails to the sender.
To enable the smime_suppress_certificate_email_check value, add the modern_sync_engine value to enabled_features key-value pair. Currently, modern_sync_engine feature is disabled by default. The admin can enable this feature preview by configuring the modern_sync_engine.
For more information, see Suppress certificate email check .
- Change in certificate searching in Global Address List (GAL): When sending an encrypted email, the Email+ app now encrypts the email using all the available certificates (found in GAL and local Keystore).
- Enhanced encryption and signing flow: The Email+ app now adds an encryption certificate when a sender has different encryption and signing certificates.
- Support for Calendar HTML note enabled: Email+ now supports richtext_event_support by default.
Email+ app administrator features and enhancements
- New value added to enabled_features: New value smime_suppress_certificate_email_check added to enabled_features key-value pair to allow support for SMIME message with certificate when receiver's email address and domain is different from senders email address. The Email+ app associates the certificate with the sender's email address, so that Email+ app can use the certificate when sending encrypted emails to the sender.
- New value added to disabled_features: New value richtext_event_support added to disabled_features key -value pair to disable richtext event support.
For more information, see Key-value pairs for customization Email+ for iOS (Cont.).
Feature previews
The following features are disabled by default and available for feature previews. The admins can enable the feature previews by configuring values for enabled_features key-value pair:
- modern_sync_engine: Improved sync engine
- eas_16: Supports Exchange Active Sync 16

Email+ app features and enhancements
- Support for Dark Mode: The Email+ app now supports Dark Mode. Email+ uses the mode enabled on the iOS device.
- Support for iOS 12 deprecated: The Email+ 4.2.0 app does not support iOS version 12.0.
Email+ app administrator features and enhancements
This release does not include new administrator features and enhancements.

Email+ app features and enhancements
This release includes the following new app features and enhancements.
- Feature preview for ActiveSync16 protocol: Email+ 4.1.0 now supports ActiveSync 16 protocol for iOS devices and the feature is available for an early preview. The ActiveSync 16 protocol allows mobile devices to synchronize email and other data with Microsoft Exchange mailbox. The ActiveSync 16 protocol is supported with the latest Exchange platform starting Exchange 2016 and Exchange Online. To support ActiveSync16 for the Drafts folders the following capabilities are added:
- ActiveSync 16 support: Sets up the synchronization engine to use ActiveSync 16 protocol.
- Display BCC contacts in Sent Items: Allows the sender to view BCC contacts in sent emails.
- Calendar attachments: Calendar attachments are synced through ActiveSync 16 protocol instead of EWS. However, the email_ews_host key-value pair is still required for notifications.
- Drafts folder Synchronization: Enables access and editing of emails in the Drafts folder from all the devices synchronized with Exchange server.
Currently, these features are disabled by default. The admins can enable the feature previews by configuring the modern_sync_engine and eas_16 values for enabled_features key-value pair.
For more information, see ActiveSync 16 KB article.
Email+ app administrator features and enhancements
This release does not include new administrator features and enhancements.