> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# PlayFab OnlineSubsystem for Unreal Engine release notes

> Version history and release notes for the PlayFab OnlineSubsystem plugin for Unreal Engine 4 and 5, covering Party, multiplayer, and lobby updates.

# PlayFab Unreal Engine OnlineSubsystem Release Notes

Refer to [QuickStart: PlayFab Online Subsystem (OSS)](/services/playfab/multiplayer/networking/party-unreal-engine-oss-quickstart) for download and install instructions.

## 2.3.8

**Release 2.3.8 is ready to use with Unreal Engine 5.7.**

UE5.7 Upgrade Fixes:

* Removed the unused `SEARCH_PRESENCE` key from the lobby search key mapping and related query filter logic, simplifying lobby search parameter handling.
* Removed dead code related to session search on Win64, as the new join logic no longer relies on this path.

Bug fixes:

* Added a new `CleanupFailedJoinSession` method to `FOnlineSessionPlayFab` to ensure proper cleanup of PlayFab and Party sessions, removal of local session references, and delegate notification when a native session join fails. This method is now called in all relevant failure paths.

* Changed logic to cache the desired session (`CachedDesiredSession`) instead of searching for it on every join, simplifying and improving the reliability of native session joins.

## 2.3.7

**Release 2.3.7 is ready to use with Unreal Engine 5.6.**

Library Updates:

* Multiplayer SDK C++ library (Windows/GDK) : From 1.7.9 to 1.8.0.
* Party SDK C++ library (Windows/GDK) : From 1.10.5 to 1.10.12.

UE5.6 Upgrade Fixes:

* Updated `OnlineSubsystemPlayFab.uplugin` to use `PlatformAllowList` instead of `WhitelistPlatforms`, and renamed `OnlineSubsystemSwitch` to `OnlineSubsystemNintendo` for consistency. Also incremented the plugin version.
* On UE 5.6 and later the `DriverClassName` parameter requires the "/Script/" prefix. For example, use `"/Script/OnlineSubsystemPlayFab.PlayFabNetDriver"` instead of `"OnlineSubsystemPlayFab.PlayFabNetDriver"`.
  Example usage:
  ```
  [/Script/Engine.GameEngine]
  +NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="/Script/OnlineSubsystemPlayFab.PlayFabNetDriver",DriverClassNameFallback="OnlineSubsystemUtils.IpNetDriver")
  ```

## 2.3.6

**Release 2.3.6 is ready to use with Unreal Engine 5.5.**

Library Updates:

* Multiplayer SDK C++ library (Windows/GDK) : From 1.7.2 to 1.7.9.
* Party SDK C++ library (Windows/GDK) : From 1.9.5 to 1.10.5.

UE5.5 Upgrade Fixes:

* `OnSessionParticipantsChanged` ([deprecated](https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-engine-5.2-release-notes?application_version=5.2#onlinesubsystem-2) in UE5.2) was removed in UE5.5. Updated PF OSS to use the new `OnSessionParticipantJoined` and `OnSessionParticipantLeft`.
* `GDKUserManager.h` was moved from `Engine\Platforms\GDK\Source\Runtime\GDKRuntime\Public\GDKUserManager.h` to `Engine\Platforms\GDK\Source\Runtime\GDKRuntime\Private\GDKUserManager.h`. Updated PF OSS to no longer depend on this header.

Bug fixes:

* Fixed an issue where a player who would unexpectedly lose connectivity might be unable to join or create another session.
* Fixed an issue where `FindSessionById` and `CreateSession` could potentially be called out of order.

Known issue:

* When using the PlayFab Online Subsystem in UE5.5 GDK, you may encounter the following runtime error: `Runtime dependency Party.dll is configured to be staged from C:\Program Files (x86)\Microsoft GDK\<version>\Party.dll and \Engine\Plugins\Online\OnlineSubsystemPlayFab\Platforms\GDK\Redist\Party.dll`.
  To resolve this issue, refer to [QuickStart: PlayFab Online Subsystem (OSS)](/services/playfab/multiplayer/networking/party-unreal-engine-oss-quickstart#unreal-engine-installed-builds).
* `NumPrivateConnections` of FOnlineSessionSettings isn't supported because the PlayFab service doesn't track private connections.

## 2.3.4

* Supported the release of UE5.4.

Updated the following libraries:

* Updated the Multiplayer SDK C++ library to version 1.7.2 for both Windows and GDK.
* Updated the Party SDK C++ library to version 1.9.5 for both Windows and GDK.

Feature fixes:

* Fixed the failure to create or join a session when the player name includes emojis or special types of characters.
* Fixed the failure to update lobby access policy.
* Fixed a potential crash caused by `GetBytes()` and `GetSize()`.
* Added missing pass through functions and interfaces for native OSS.
* \[Steam] Fixed the game crash when launching a Steam game without first launching Steam application.
* \[Steam] Replaced `GetAuthSessionTicket()` with `GetAuthTicketForWebApi()` for Steam 1.57 SDK.

Known issue:

* When using the PlayFab Online Subsystem in UE5.4 GDK, you may encounter the following runtime error: `Runtime dependency Party.dll is configured to be staged from C:\Program Files (x86)\Microsoft GDK\<version>\Party.dll and \Engine\Plugins\Online\OnlineSubsystemPlayFab\Platforms\GDK\Redist\Party.dll`.
  To resolve this issue, refer to [QuickStart: PlayFab Online Subsystem (OSS)](/services/playfab/multiplayer/networking/party-unreal-engine-oss-quickstart#unreal-engine-installed-builds).
* `NumPrivateConnections` of FOnlineSessionSettings isn't supported because PlayFab service doesn't track private connections.

## 2.3.3

Feature Updates:

* Added support for dedicated server scenarios. For more information on setting up dedicated servers for your game, see the [Dedicated Server Setup Guide](/services/playfab/multiplayer/networking/party-unreal-engine-oss-dedicated-servers).
* Added better integration with the [PlayFab SDK Unreal Engine (UE) Marketplace Plugin](https://www.unrealengine.com/marketplace/product/playfab-sdk). For more information on integrating the PlayFab Plugin, see the [PlayFab SDK UE Marketplace Plugin Integration Guide](/services/playfab/multiplayer/networking/party-unreal-engine-oss-playfab-plugin-integration).
* Introduced a new configuration boolean, `bForceAutoLogin`.
  * Previously on Win64 and PlayStation platforms, the default behavior was to always attempt to call `AutoLogin()` for the primary local user.
  * This new configuration boolean allows `AutoLogin()` to be disabled for Win64 and PlayStation platforms if you wish to call `Login()` elsewhere.
  * The default behavior remains the same with `bForceAutoLogin` set to `true`. You can configure `bForceAutoLogin` in your `<Windows|PS4|PS5>Engine.ini` file under the `OnlineSubsystemPlayFab` section.
    ```ini theme={null}
    [OnlineSubsystemPlayFab]
    bForceAutoLogin=<true|false>
    ```
  * Login behavior for all other platforms remains unchanged.

## 2.3.2

Updated the following libraries:

* Updated the Multiplayer SDK C++ library to version 1.6.5 for both Windows and GDK.
* Updated the Party SDK C++ library to version 1.8.9 for both Windows and GDK.

## 2.3.1

* Supported UE5.3 and previous UE versions (UE4.27+, UE5.0, UE5.1, and UE5.2. Refer to [QuickStart: Which versions of Unreal Engine are supported](/services/playfab/multiplayer/networking/party-unreal-engine-oss-overview#which-versions-of-unreal-engine-are-supported)).

Known issue:

* The WinGDK version of UE5.3 is known to have an issue related to HTTP requests. Epic Games has recognized this problem and addressed it in version 5.4. To work around this issue in UE5.3, launch your game using `-UseWinHttpGDK` command-line argument to switch to WinHTTP instead of xCurl. For more information, see Unreal Engine forum post about [5.3 WinGDK HTTP running issue with xCurl](https://udn.unrealengine.com/s/question/0D54z00009l9fK0CAI/53-wingdk-http-module-wont-compile-with-xcurl).

## 2.3.0

* Supported UE5.2 and previous UE versions (UE4.27+, UE5.0, and UE5.1. Refer to [QuickStart: Which versions of Unreal Engine are supported](/services/playfab/multiplayer/networking/party-unreal-engine-oss-overview#which-versions-of-unreal-engine-are-supported)).

Feature fixes:

* Implemented `FOnlineSessionPlayFab::SendSessionInviteToFriends` and `FOnlineExternalUIPlayFab::ShowInviteUI` for GDK, Steam, and PlayStation with native platform invites
* Fixed the display of player platform ID
* Fixed failure to update member properties and lobby search keys
* Fixed failure to play new game after suspend and resume on the XBOX platform
* Fixed microphone audio issue on GDK
* Fixed the modification on `bIsDedicated` in `OnlineSessionInterfacePlayFab`

Compile fixes:

* Deprecated XboxOne and replaced it with XB1 for Unreal Engine 5.2
* Resolved build warnings, non-unity build errors, compilation issues when users lack access to Unreal Engine across all platforms

Known issue:

* To invite a Steam or PlayStation player, the host must be on the same platform.

## 2.0.0

* UE4 engine OSS PlayFab is updated to use Multiplayer features offered by PlayFab such as Lobby, Matchmaking along with PlayFab Party.
  This update replaces the XBOX provided MPSD with PlayFab Lobby and XBL Smart match with Azure Matchmaking service.
* XDK is no longer supported for this version of the OSS.

## 1.0.7

* UE4 Engine version 4.26 is the recommended version to use with this version of OnlineSubsystemPlayfab.

### Notes:

* Rename OnlineSubsystemPlayFabParty to OnlineSubsystemPlayfab.


## Related topics

- [Azure PlayFab Party Online Subsystem for Unreal](/build/console-features/networking/game-mesh/party-unreal-online-subsystem.md)
- [Integrate the PlayFab Unreal Engine Marketplace plugin](/services/playfab/multiplayer/networking/party-unreal-engine-oss-playfab-plugin-integration.md)
- [PlayFab for Unreal Engine Overview](/services/playfab/sdks/unified-unreal/overview.md)
- [PlayFab Online Subsystem (OSS) Quickstart](/services/playfab/multiplayer/networking/party-unreal-engine-oss-quickstart.md)
- [PlayFab Online Subsystem (OSS)](/services/playfab/multiplayer/networking/party-unreal-engine-oss-overview.md)