http://blogs.technet.com/b/dpm/archive/2010/11/03/protect-unprotect-protect-unprotect-understanding-how-dpm-2010-retention-works.aspxWith special thanks to Fahd Kamal for the backgrounder content. Imagine that you are experimenting with DPM 2010. You protect some data, and then you remove that protection group. Then, showing DPM to one of your friends, you protect the data againen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/dpm/archive/2010/11/03/protect-unprotect-protect-unprotect-understanding-how-dpm-2010-retention-works.aspx#3377484Tue, 28 Dec 2010 09:52:13 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3377484Ruud Baars [MSFT]<p>Inactive data sources are now included</p> <p>One typical error code is 31224</p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3377484" width="1" height="1">