I'm assuming you want .bacpac file of a Azure SQL DB. Follow below steps.
- If you have SSMS installed in your machine, connect to database using ssms, use the server credentials or get access to take backup.
- Go to database, right click -> Task ->Export Data tier application
- Select storage account, container and file name, or you can export to your local and click next and then Export.
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Once the file exported, you can import the same to another server
Hope this help!
Thank You!