> ## 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. # Update Lobby As Server > Preview: Update fields related to a joined server in the lobby the server is in. Servers can keep a lobby from expiring by being the one to "update" the lobby in some way. Servers have no impact on last member leave/last member disconnect behavior. Allowed entity token types: game_server ## Error codes This operation may return the following PlayFab errors: | Error | Code | | --- | --- | | LobbyBadRequest | 13007 | | LobbyDoesNotExist | 13000 | | LobbyRateLimitExceeded | 13001 | | LobbyServerMismatch | 13012 | | LobbyServerNotFound | 13013 | ## OpenAPI ````yaml /services/playfab/api-references/rest/multiplayer/multiplayer.openapi.json post /Lobby/UpdateLobbyAsServer openapi: 3.0.0 info: version: '260922' title: PlayFab Multiplayer API description: >- API methods for managing multiplayer servers. API methods for managing parties. The lobby service helps players group together to play multiplayer games. It is often used as a rendezvous point for players to share connection information. The TrueSkill service helps titles to estimate a player's skill based on their match results. The player skill values from this service are commonly used by a matchmaking service to provide players with balanced matches. termsOfService: https://playfab.com/terms/ contact: url: https://community.playfab.com/index.html license: name: Apache 2.0 url: https://github.com/PlayFab/API_Specs/blob/master/LICENSE servers: - url: https://{titleId}.playfabapi.com description: PlayFab title endpoint variables: titleId: default: your_title_id description: Your PlayFab title ID (hex). security: [] tags: - name: Lobby description: '' - name: Matchmaking description: Matchmaking APIs - name: Matchmaking Admin description: Matchmaking Admin APIs - name: MultiplayerServer description: Multiplayer Server APIs - name: PubSub description: PlayFab PubSub APIs - name: TrueSkill description: TrueSkill APIs - name: TrueSkill Admin description: TrueSkill Admin APIs paths: /Lobby/UpdateLobbyAsServer: post: tags: - Lobby summary: Update Lobby As Server description: > Preview: Update fields related to a joined server in the lobby the server is in. Servers can keep a lobby from expiring by being the one to "update" the lobby in some way. Servers have no impact on last member leave/last member disconnect behavior. Allowed entity token types: game_server ## Error codes This operation may return the following PlayFab errors: | Error | Code | | --- | --- | | LobbyBadRequest | 13007 | | LobbyDoesNotExist | 13000 | | LobbyRateLimitExceeded | 13001 | | LobbyServerMismatch | 13012 | | LobbyServerNotFound | 13013 | operationId: UpdateLobbyAsServer requestBody: content: application/json: schema: $ref: '#/components/schemas/UpdateLobbyAsServerRequest' description: >- Preview: Request to update the serverData and serverEntity in case of migration. Only a game_server entity can update this information and this is restricted to client owned lobbies which are using connections. responses: '200': $ref: '#/components/responses/LobbyEmptyResult' '400': $ref: '#/components/responses/ApiErrorWrapper' security: - EntityToken: [] components: schemas: UpdateLobbyAsServerRequest: description: >- Preview: Request to update the serverData and serverEntity in case of migration. Only a game_server entity can update this information and this is restricted to client owned lobbies which are using connections. type: object properties: CustomTags: description: >- The optional custom tags associated with the request (e.g. build number, external trace identifiers, etc.). type: object LobbyId: description: The id of the lobby. type: string ServerData: description: >- The private key-value pairs which are visible to all entities in the lobby and modifiable by the joined server. Optional. Sets or updates key-value pairs on the lobby. Only the current lobby lobby server can set serverData. Keys may be an arbitrary string of at most 30 characters. The total size of all serverData values may not exceed 4096 bytes. Values are not individually limited. There can be up to 30 key-value pairs stored here. Keys are case sensitive. type: object ServerDataToDelete: description: >- The keys to delete from the lobby serverData. Optional. Optional. Deletes key-value pairs on the lobby. Only the current joined lobby server can delete serverData. All the specified keys will be removed from the serverData. Keys that do not exist in the lobby are a no-op. If the key to delete exists in the serverData (same request) it will result in a bad request. type: array items: type: string ServerEntity: allOf: - $ref: '#/components/schemas/EntityKey' description: >- The lobby server. Optional. Set a different server as the joined server of the lobby (there can only be 1 joined server). When changing the server the previous server will automatically be unsubscribed. required: - LobbyId example: LobbyId: 12345678-1234-1234-1234-123456789ABC ServerEntity: Id: '1234' Type: game_server TypeString: game_server ServerData: MyDataKey: MyDataKey value ServerDataToDelete: - MyOldGameKey EntityKey: description: >- Combined entity type and ID structure which uniquely identifies a single entity. type: object properties: Id: description: Unique ID of the entity. type: string Type: description: >- Entity type. See https://learn.microsoft.com/gaming/playfab/features/data/entities/available-built-in-entity-types type: string required: - Id LobbyEmptyResult: type: object properties: {} ApiErrorWrapper: description: The basic wrapper around every failed API response type: object properties: code: description: Numerical HTTP code type: integer status: description: String HTTP code type: string error: description: Playfab error code type: string errorCode: description: Numerical PlayFab error code type: integer errorMessage: description: Description for the PlayFab errorCode type: string errorDetails: description: Detailed description of individual issues with the request object type: object required: - code - errorCode responses: LobbyEmptyResult: description: '' content: application/json: schema: type: object properties: code: type: integer description: >- The Http status code. If X-ReportErrorAsSuccess header is set to true, this will report the actual http error code. status: type: string description: The Http status code as a string. data: $ref: '#/components/schemas/LobbyEmptyResult' ApiErrorWrapper: description: This is the outer wrapper for all responses with errors content: application/json: schema: $ref: '#/components/schemas/ApiErrorWrapper' securitySchemes: EntityToken: type: apiKey in: header name: X-EntityToken description: >- This API requires an Entity Session Token, available from the Entity GetEntityToken method. ```` ## Related topics - [Update Lobby As Server](/services/playfab/api-references/rest/multiplayer/lobby/update-lobby-as-server.md) - [Lobby ownership](/services/playfab/multiplayer/lobby/owner-requirements-and-privileges.md) - [Update Lobby](/services/playfab/api-references/rest/multiplayer/lobby/update-lobby.md) - [PFLobbyServerPostUpdateAsServer](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/functions/pflobbyserverpostupdateasserver.md) - [Lobby.ServerPostUpdate](/services/playfab/multiplayer/lobby/unity-multiplayer-api-reference/PlayFab.Multiplayer/Lobby/ServerPostUpdate.md)