Email Archiving and Email Hygiene are essentially two strategies of accomplishing efficient communications, and as such, are often coupled together and sold as part of the same product.
Exchange Server 2010 and 2013 archives emails natively but you need a purpose built solution which satisfies the regulatory, legal and policy requirements of business. If you have older Exchange Server you have no choice but to go with a third party email archiving solution.
Email archiving is about more than just retrieving your organization’s information. Archiving 2.0 is about understanding the information in those emails.
With more than 5,000 existent regulations pertaining to email storage and the ubiquity of email as a communication tool, it stands to reason that email is a huge factor in subpoenas and lawsuits filed due to information in employee emails.