Information Management and Ariba Contracts Management

Many organisations have prescribed retention and disposal periods for retaining contract documents i.e. 15 year retention beyond the contract terminate date.

How are such documents preserved within Ariba, what legal hold / records management facilities exist? Or does an organisation like my own need to externalize the documents (outside of Ariba) to achieve such an outcome? Are there technical options in this regard?

I would certainly value any input on the above based on other customer experiences

Thanks in advance

Ian