---
title: ActiveSync16 for iOS devices
slug: emailplus/guide/ios/activesync16-for-ios-devices
docTags: 
createdAt: 2026-09-07T11:21:47.666Z
---

Ivanti Email+ supports "**ActiveSync 16**" protocol for iOS devices. The "**ActiveSync 16**" protocol allows mobile devices to synchronize email and other data with Microsoft Exchange mailbox. The ActiveSync 16 protocol supports latest Exchange platform starting from Exchange 2016 and Exchange Online.

:::hint{type="info"}
Starting from Email+ 4.15.0 version, ActiveSync 16 is enabled by default on all the iOS devices that are supported by Email+.
:::

Previously, Microsoft announced **Draft** Folder synchronization for the first time with ActiveSync protocol version 16. The capability to sync draft messages between devices is now available on the Email+ app.

- Email+ 4.1.0 for iOS provides an early preview of the following capabilities that are now supported through ActiveSynce16 protocol:
  - **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 Microsoft Exchange server.

ActiveSync 16 is now enabled by default, to disable **eas\_16** value add it to the "**disabled\_features**" key-value pair. The following features are available with **eas\_16**:

- Displays BCC contacts in **Sent** items
- Syncs Calendar attachments through ActiveSync 16 protocol instead of EWS. With **eas\_16** enabled, “**calendar\_attachments**”:“true” and “**email\_ews\_host**”:“\<host>” KVPs are no longer required to see event attachments
- Syncs Drafts with the server If the server doesn’t support ActiveSync 16.0 or newer, mentioned features won’t be enabled and Email+ app will work as per the current settings.