Search Exporter getting error message.Unexpected HTTP status code Unauthorized:Unauthorized (4280176)

After upgrading, Search Exporter is throwing the following error:

Unexpected HTTP status code Unauthorized:Unauthorized

To Test:

1. Log into the Archive Manager Administration Site
2. Try to open Retention Policies.
3. If prompted to login click on cancel. 
4. Go to Authentication Mode at the top of Archive Manager Administration website. 
5. It doesn't matter which authentication method is currently selected. Please select the method that is currently not being used. 
6. Log back into the Archive Manager website. 
7. Switch back to your original authentication method. 
8. Try to export email again using the Search Exported. 

You should no longer be receiving and unauthorized error message. 

Note:

The error "Unexpected HTTP status code Unauthorised: Unauthorized" can also be seen if the incorrect authentication type is selected in the search exporter, for example the website is set to Windows Authentication, but the search exporter is using Forms authentication.