Workflow Manager SharePoint 2013 Issue 403 Forbidden – Can anyone help?

Hi All,

I have configured workflow manager on a dedicated server in my sharepoint farm. The configuration steps were completed successfully including the workflow settings and service bus (all steps ticked to show successful)

The workflow manager client has then been installed on the 2 front end servers and the 2 endpoints setup in IIS.

When going to central admin I can see the proxy setup and clicking on it shows it is connected successfully (after registering via powershell)

The issues are as follows;

Opening either endpoint does not display the XML file but a 403 forbidden

SharePoint Designer does not display the 2013 workflow option (even after clearing designer client cache)

It does however open the XML file when opening the endpoint in an IE session opened as administrator – I feel the issue relates to permissions in some way but struggling to see what? The permissions set are set as builtin\administrators.

Looking at that group it has the administrator account and our 2 regular farm accounts.

Any ideas folks I’ve spent a long time on this 🙂 any help would be appreciated

Lee