Hi @pragadeeshraju-2799, you need to change the server's fully qualified name from '--server "testsqlsvr.database.windows.net"' to '--server "testsqlsvr" '.
Below is the command you can use:
az sql db import --resource-group "test" --server "testsqlsvr" --name "TEST_DB"
--storage-key-type "StorageAccessKey" --storage-key "wegfiajebfkjsbfiusdkbszzzzzxxxxxxxxxxxxxxxxx==" --storage-uri "https://test/asdb.bacpac" -u "user" -p "password"
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