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134 Stars 26 Forks GNU General Public License v2.0 4.4K Commits 83 Opened issues


A third-party Pidgin plugin for Microsoft Lync/OCS - clone of upstream

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SIPE is a third-party plugin for the Pidgin/Adium/Miranda/Telepathy multi-protocol instant messaging clients/frameworks. It implements the extended version of SIP/SIMPLE used by various products:

* Skype for Business
* Microsoft Office 365
* Microsoft Business Productivity Online Suite (BPOS)
* Microsoft Lync Server
* Microsoft Office Communications Server (OCS 2007/2007 R2)
* Microsoft Live Communications Server (LCS 2003/2005)

With this plugin you should be able to replace your Microsoft Office Communicator client with Pidgin/Adium/Miranda/Telepathy.


The plugin has support for

* Instant Messaging (IM)
* Multiparty chat (OCS 2005) or conference (OCS 2007+)
* Group chat (Lync 2010) or Persistent chat (Lync 2013) - [MS-XCCOSIP]
* Enhanced presence
* Calendar integration with Exchange 2007+ (can be disabled)
* Contact details information - company, phones, photo, web site, etc.
* Unified Contact Store (Lync 2013) - [MS-OXWSCOS]
* Contact search - [MS-PRES] and [MS-DLX] methods supported
* Encrypted file transfer (OCS2007: send & receive, Lync: receive only)
* Voice & Video calls
* Call initiation through PBX
* NTLMv2, Kerberos & TLS-DSK authentication methods
* Single Sign-On (depends on OS and authentication method)
* Automatic SSL/TLS protection for SIP/HTTP connections
* Crypto implementation using NSS or OpenSSL
* Localization

The plugin has backends for

* Pidgin/Finch (libpurple)
* Adium (libpurple)
* Miranda
* Telepathy (under development)

Advantages over Office Communicator products

* Available on broader range of platforms: Linux, *BSD, Maemo, OSX,
  commercial UNIX, Windows.
* Ability to simultaneously connect to several Office Communicator
  accounts in addition to public IM network accounts like MSN, AOL,
  Yahoo. For example one account is in vendor company and another is
  in client company.
* Keeps history of communications in environments without Outlook. For
  example in companies where Lotus Notes is deployed as a default
  groupware client instead of Outlook.
* Lotus Notes/Domino calendar integration. Unique to SIPE.
* Open development model, open source product. License is GPL-2.0-or-later


The Pidgin or Adium projects do not support third-party plugins! Please do not ask questions about SIPE in their forums or report SIPE problems to their bug trackers.

If you set up your Office Communicator/Lync account with SIPE for the first time then please make sure to read this page:

If you encounter problems then please make sure to check out the Frequently Asked Question page:

If you still have problems then please check the support forum if another user encountered the same problem and maybe solved it already:

If you think that you have found a bug in SIPE then please report it to the SIPE bug tracker:

The SIPE project kindly requests that you do not ignore the instructions that appear at the head of the "Create Ticket" page. These instructions are there for a reason and if you ignore them then you will only cause unnecessary work for the project and yourself. Please do not report missing features as bugs.

New or missing features can be requested here:


SIPE has already been localized for several languages. You can help to translate SIPE to your native language at Transifex:

The service offers a convenient web editor.

D-Bus support (libpurple backend only)

If libpurple and SIPE have been compiled with D-Bus support and the D-Bus backend has been successfully initialized at libpurple start, then SIPE extends the libpurple D-Bus interface with the following APIs:

Function          Description

SipeCallPhoneNumber(aId, phone_number) Same as "Call a phone number" menu

SipeJoinConferenceWithOrganizerAndId(aId, organizer_email, meeting_id) Same as "Organizer email" and "Meeting ID" in the dialog opened by "Join scheduled conference..."

SipeJoinConferenceWithUri(aId, uri) Same as "Meeting location" in the dialog opened by "Join scheduled conference..."

SipeRepublishCalendar(aId) Same as "Republish Calendar" menu

SipeResetStatus(aId) Same as "Reset status" menu

To use the APIs from a script you'll need a D-Bus object for the libpurple interface and a valid & connected account ID as first parameter. An invalid account ID will cause SIPE to silently ignore the D-Bus invocation.

Example script code (without error checks to keep it simple):


use Net::DBus;
my $bus       = Net::DBus->session;
my $service   = $bus->get_service('im.pidgin.purple.PurpleService');
my $purple    = $service->get_object('/im/pidgin/purple/PurpleObject',
my $accountId = $purple->PurpleAccountsFind($accountName, 'prpl-sipe');
$purple->SipeXYZ($accountId, parameters... );


import dbus
bus       = dbus.SessionBus()
object    = bus.get_object("im.pidgin.purple.PurpleService",
purple    = dbus.Interface(object, "im.pidgin.purple.PurpleInterface")
accountId = purple.PurpleAccountsFind($accountName, 'prpl-sipe')
purple.SipeXYZ(accountId, parameters... );

Installing from a distribution repository

Many Open Source OS distributions have a ready-made package "pidgin-sipe". Before trying to compile it from the source code yourself you should try to install this package with the standard installation method provided by your OS.

Once you have SIPE installed and are connected to your account you can check from the following Pidgin menu

Accounts ->  -> About SIPE plugin...

which optional features have been enabled in your SIPE build.

Do It Yourself I: compiling against "pidgin" package

NOTE: for instructions how to setup a build environment on Windows to compile the Windows Pidgin plugin, please read:

NOTE: for instructions how to cross-compile the Windows Pidgin plugin on Linux, please read:


NOTE: for instructions how to compile the SIPEAdiumPlugin on Mac OS X, please read:


If you already have installed the "pidgin" package from your distribution repository and want compile SIPE from source code yourself, then you need to install the necessary headers first. Depending on your distribution you'll need to install one of the following packages


For the compilation you'll need to install a C compiler and some of the following packages


pkg-config libglib2.0-dev libxml2-dev libgmime-2.6-dev (optional)

pkgconfig libglib2-devel libxml2-devel gettext-devel gmime-devel (optional)

You have to choose between NSS or OpenSSL for the crypto backend. You'll need one of the following packages

for NSS:

for OpenSSL: libssl-dev openssl-devel

If you want to enable Kerberos authentication support then you'll need one of the following packages


If you additionally want to disable the internal NTLM implementation and authenticate with NTLM via GSSAPI then you'll need one of the following packages


If you want to enable the D-Bus support then you'll need one of the following packages


If you want to enable Voice & Video features then you'll need some of the following packages. You need to install the same version of the GStreamer development packages which where used to compile Pidgin!

libnice-dev                   (>= 0.1.13)
libpurple-dev                 (>= 2.10.12)

farstream02-devel gstreamer1-devel gstreamer1-plugins-base-devel libnice-devel (>= 0.1.13) libpurple-devel (>= 2.10.12)

Now you should be able to compile the source code with

./configure --prefix=/usr

If you get errors then you are missing some required package. After successful compilation you can install SIPE with:

su -c "make install"

If you get errors from configure or libtool about version conflicts then you need to regenerate the autoconf files. You'll need these additional packages


Now you should be able to regenerate the files with

autopoint --force
AUTOPOINT="intltoolize --copy --force --automake" \
    autoreconf --force --install

After that go back to the configure step above.

Do It Yourself II: compiling against self-compiled pidgin

If you have compiled pidgin from source code yourself then you'll have to specify the correct installation path in configure. Usually pidgin is installed in /usr/local so the following command should work

./configure --prefix=/usr/local

The rest of the steps are the same as in the previous section.

Do It Yourself III: building from git checkout

Building from a git checkout is meant for project maintainers, i.e. you need to generate the configure script first:


The rest of the steps are the same as in the previous sections.

To clean all artifacts and reset the source tree to pristine condition use

make maintainer-clean

If you just want to quickly run a one-shot build from a git checkout then you can use the following helper script which executes all necessary steps in the correct order:


Contributing code

If you want to contribute to the SIPE project please have a look at

Some of the instructions are unfortunately out-dated. If in doubt then ASK from the current maintainers before committing!

Please also have a look at the Pidgin coding style guide

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