Anyone using the Azure DSC Extension for ARM deployments with the “AutoUpgradeMinorVersion” property set to true will notice that the extension version has gone up to 2.9.1. No official announcement as yet on what is in it, but testing has shown that at a minimum this includes a fix for an issue with server 2016 TP4 OS’s where DSC deployments would fail with the error:
ConvertTo-MOFInstance : System.ArgumentException error processing property 'Password' OF TYPE 'MSFT_Credential': Certificate 'AAAAAAAAAAAAAAAAAAA' cannot be used for encryption. Encryption certificates must contain the Data
Encipherment or Key Encipherment key usage, and include the Document Encryption Enhanced Key Usage (220.127.116.11.4.1.311.80.1).