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Informations about the package activesync
Horde ActiveSync
PHP library implementing the Microsoft Exchange ActiveSync (EAS) protocol,
versions 2.5 through 16.1. It decodes WBXML requests from mobile clients,
drives synchronization through a pluggable backend driver, and encodes WBXML
responses — including streamed Sync response delivery for clients with hard
read timeouts.
In a typical Horde deployment, this package is the protocol engine. The
data backend lives in horde/core as Horde_Core_ActiveSync_Driver, which
talks to IMAP (mail), Kronolith (calendar), Turba (contacts), Nag (tasks), and
Mnemo (notes). The library itself has no Horde application dependencies at
runtime and can be embedded with a custom driver.
Documentation
The documentation is split by audience:
| You are… | You want to… | Read |
|---|---|---|
| Administrator / end user | Enable ActiveSync, configure protocol versions, streaming, logging, the web server endpoint, and per-user policy | doc/configuration.md |
| Administrator / operator | Monitor device health, triage live problems, and use the CLI and admin workflows | doc/ops-monitor.md |
| Library user / integrator | Embed the library in your own product: server object, driver API, state backends, custom backends | doc/integration.md |
| ActiveSync developer | Understand the internals: components, request lifecycle, Sync anatomy, state machine, tests | doc/architecture.md |
Cross-cutting references, useful to all three:
| Topic | Read |
|---|---|
| Supported EAS protocol versions, negotiation, and what each version adds | doc/protocol-versions.md |
Streamed Sync response delivery — design, error model, tuning |
doc/sync-streaming.md |
| Heartbeat polling and export performance — batched STATUS, read-only state loads, bulk export | doc/sync-performance.md |
| Open work and the Horde 6 roadmap | doc/todo.md |
At a glance
Protocol versions
All EAS versions from 2.5 to 16.1 are implemented and production-supported.
Clients negotiate down to the server's advertised ceiling; the ceiling is
configurable globally, per user, and per device. Details, the version
negotiation mechanics, and a per-version feature delta are in
doc/protocol-versions.md.
| Version | Notes |
|---|---|
| 2.5 | Baseline; reduced command set (no Settings, ItemOperations, Find) |
| 12.0 / 12.1 | AirSyncBase bodies, provisioning 2, empty/hanging Sync, SyncCache |
| 14.0 / 14.1 | Conversations, reply/forward state, rights management, body parts |
| 16.0 | Calendar instance model, drafts sync, Find, AirSyncBase:Location |
| 16.1 | Meeting time proposals, account-only remote wipe |
Feature highlights
- Mail: folder & message sync, flags, drafts (incl. EAS 16 draft
editing/sending), send/reply/forward, attachments, meeting requests,
mailbox
Findwith KQL parsing, GAL search - Calendar: full recurrence + exceptions, attendees, meeting responses, EAS 16 instance model, meeting time proposals (16.1)
- Contacts / Tasks / Notes: full CRUD sync incl. task recurrence
- Device management: provisioning & policies, remote wipe (full and account-only), per-device protocol ceilings, per-device logging
- State: SQL (default) or MongoDB backends, sync-key/modseq change
tracking,
Pinglong-poll,SyncCache - Delivery: optional streamed
Syncresponses (chunked HTTP) with deferred up-sync import and WBXML keep-alives, so clients with ~30 s read timeouts survive large batches — seedoc/sync-streaming.md - Efficiency: heartbeat polling batches all mailbox status checks into
one IMAP round trip and reuses memoized, lock-free state reads; message
export prefetches email items in batches — see
doc/sync-performance.md
Package layout
License
GPL-2.0-only. See LICENSE.
References
All versions of activesync with dependencies
php Version ^7.4 || ^8
horde/compress Version ^3 || dev-FRAMEWORK_6_0
horde/date Version ^3 || dev-FRAMEWORK_6_0
horde/exception Version ^3 || dev-FRAMEWORK_6_0
horde/icalendar Version ^3 || dev-FRAMEWORK_6_0
horde/log Version ^3 || dev-FRAMEWORK_6_0
horde/mapi Version ^2 || dev-FRAMEWORK_6_0
horde/mime Version ^3 || dev-FRAMEWORK_6_0
horde/stream Version ^2 || dev-FRAMEWORK_6_0
horde/support Version ^3 || dev-FRAMEWORK_6_0
horde/translation Version ^3 || dev-FRAMEWORK_6_0
horde/util Version ^3 || dev-FRAMEWORK_6_0
ext-ctype Version *