In our exchange 2010 environment, we have applied messaging records management (MRM) and where by all users email will remain in Outlook INBOX for 4 months retention and afterwards it will move to another folder called "Project folder(INBOX)" with 18 months retention. The issue is one of our director applied outlook rule and that is any email coming to Outlook INBOX (where 4 months retention) will redirect to Projectfolder (INBOX)(18 months retention) with exception of u1, u2,u3, u4 etc. meaning that u1,u2,u3, u4 emails will be in Outlook inbox and rest of emails will move to Projectfolder(inbox). The problem is Outlook INBOX is keeping only 3 weeks emails from U1, U2, U3, U4, and rest of emails are automatically moving to ProjectFolder(Inbox), as per retention policy emails of 4 months should stay in Outlook folder but in this case only 3 weeks emails are remaining in OutlookINBOX folder. Can you please advice what things should I need to look at for investigation.