Upgrade to Windchill 13 breaks REST API
Version: Windchill 13.0
Use Case: Previously working REST API GET example in Windchill 12 now throws a "The requested resource [/Windchill/oauth/servlet/odata/v5/ProdMgmt/Parts] is not available" error.
Description:
I had a set of examples in Postman working when we were on our Windchill12 installation. Upgraded to Windchill 13 in December and I went to dust of the examples. Same GET calls now throw this error.

For the sharp-eyed, yes this calls the v5 of the API that is deprecated. The same result, though, happens on the latest v7 version.

I confirmed that the Azure to securityContext.properties and wt.properties file settings are correct but Windchill 13 does have some additional lines in the securityContext file.
If I try the same from the Windchill interface, everything works fine for the same URL (sans the oauth piece needed for SSO).


