Syntax
Parameters
xboxLiveContext   _In_Type: XblContextHandle An XBOX services context handle created with XblContextCreateHandle. xboxUserId   _In_
Type: uint64_t The XBOX User ID of the player. achievementId   _In_z_
Type: char* The UTF-8 encoded achievement ID as defined by XDP or Dev Center. percentComplete   _In_
Type: uint32_t The completion percentage of the achievement to indicate progress. Valid values are from 1 to 100. Set to 100 to unlock the achievement. Progress will be set by the server to the highest value sent async   _In_
Type: XAsyncBlock* Caller allocated AsyncBlock.
Return value
Type: HRESULT HRESULT return code for this API operation.Remarks
This API will work even when offline on PC and XBOX One. Offline updates will be posted by the system when connection is re-established even if the title isn’t running. The result of the asynchronous operation can be obtained by calling XAsyncGetStatus inside the AsyncBlock callback or after the AsyncBlock is complete. If the achievement has already been unlocked or the progress value is less than or equal to what is currently recorded on the server, then XAsyncGetStatus() inside the callback will return HTTP_E_STATUS_NOT_MODIFIED (0x80190130L).REST Call
V2 POST/users/xuid({xuid})/achievements/{scid}/update