Hi
I am trying to read data from an external list using PowerShell.
I am using SharePoint 2013 SP1 May 2015 CU on-premise.
when I try and access the list using PowerShell I get an error "Get ItemById with 1 arguments: "Attempted to perform an unauthorised operation"
I can browse to the list and display the list items no problem.
In the ULS log there was the error message :- External List: User passes list permissions check, but an unsupported authentication configuration was identified. Operation disallowed.
I have researched this and nobody seems to have come up with a solution. There are lots of people hypothesizing what the problem could be but no one actually stating what the definitive solution is.
I am using BDC Metaman by LightningTools to create the content type and then creating the external list from the browser.
Thanking you in advance