Microsoft has released a preview of the Azure Analysis Services web designer. This is a browser-based experience that will allow developers to start creating and managing Azure Analysis Services (AAS) semantic models quickly and easily. SQL Server Data Tools (SSDT) and SQL Server Management Studio (SSMS) will still be the primary tools for development, but this new designer gives you another option for creating a new model or to do things such as adding a new measure to a development or production AAS model.
A highly requested feature is that you can import a Power BI Desktop file (.pbix) into an Analysis Services database. And once imported you can reverse engineer to Visual Studio. Note for PBIX import only Azure SQL Database, Azure SQL Data warehouse, Oracle, and Teradata are supported at this time and Direct Query models are not yet supported for import (Microsoft will be adding new connection types for import every month).
Read on for more details.