Azure Data Factory Post Message to Azure Storage Queue failing

Append the SAS Token to the end of the URL and it will solve the problem. Without the SAS Key, any HTTP Request would 404.

You can refer this MSFT Q&A To Append a SAS token to each source or destination URL

azcopy cp "C:\local\path" "https://account.blob.core.windows.net/mycontainer1/?sv=2018-03-28&ss=bjqt&srt=sco&sp=rwddgcup&se=2019-05-01T05:01:17Z&st=2019-04-30T21:01:17Z&spr=https&sig=MGCXiyEzbtttkr3ewJIh2AR8KrghSy1DGM9ovN734bQF4%3D" --recursive=true

Refer - https://social.msdn.microsoft.com/Forums/en-US/1d5e9f0f-e1c9-4396-b5b3-2caa8fb5076b/azure-file-storage-sas-token?forum=AzureDataLake