I want to use [CmisSync](http://cmissync.com/documentum/) to synchronize [Documentum](https://en.wikipedia.org/wiki/Documentum) folders/documents, so I must enable [CMIS](https://en.wikipedia.org/wiki/Content_Management_Interoperability_Services) (Content Management Interoperability Services) in Documentum.

* The [Installation Notes](http://developer-downloads.emc.com/akdlm/ReadMe_HowToUseImage.txt?auth_code=1412690446_277432323d1531593d882142be0e2651&fileExt=.txt) and Readme don't even mention CMIS.
* It does not seem to be enabled by default, as the [CMIS URL](https://github.com/aegif/CmisSync/wiki/What-address) `http://localhost:8080/cmis/resources/` returns error 404 even though the REST URL is working correctly.

**QUESTION:** How to do enable CMIS in Documentum?

Environment:

* [Documentum Developer Edition 7.1](https://developer-content.emc.com/downloads/dctm_dev_edition_process.htm?product=dcm_dev) (I am not an EMC paying customer, so I use that because it is the only version which is freely downloadable)
* CentOS/Postgres