Nas notas de versão do Power Query 2.26.4128.242:
The following Office versions are supported:
Microsoft Office 2013:
Power Query Premium:
- Features Included: All.
- SKUs supported: Professional Plus, Office 365 ProPlus or Excel 2013 Standalone.
Power Query Public:
- Features included: All, except the following connectors: Corporate Power BI Data Catalog, Azure-based data sources, Active Directory, HDFS, SharePoint Lists, Oracle, DB2, MySQL, PostgreSQL, Sybase, Teradata, Exchange, Dynamics CRM, SAP BusinessObjects, Salesforce.
- SKUs supported: All Desktop SKUs.
Portanto, a menos que você esteja executando o "Office 2013 Professional Plus", o "Office 365 ProPlus" ou o "Excel 2013 Standalone", o instalador do PQ instalará a versão "Pública" do Power Query e você não poderá use os conectores do Azure.