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Hi,<br />
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Do you have the setting checked for waiting for a full backup by chance?
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Update. Just as a test, I moved my mailbox to another server. This is a Public Folder server that has a single mailbox database on it. This time, I set the value to zero for number of days to retain deleted items. I thought zero would pretty much disable this setting. Well, this morning I not only have all the items I deleted from 2 days ago but more. They just keep piling up. I have been going crazy trying to figure this out. If someone has an answer, please feel free to provide a solution. This is really causing issues with disk space.
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Microsoft assisted in this solution
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I am not a believer in the Deleted Items Retention feature. I have the setting configured for 1 day on the maiilbox databases. On the General tab of the Properties of the mailbox database, the setting under Deletion Settings which reads &quot;Keep deleted items for (days): is set to 1. Yet, when Iook at some users mailboxes, I see messages in the Recover Deleted Items folder going back almost two weeks. I am opening the users mailbox on my workstation by creating a profile in my Outlook. I open the mailbox, highlight the Deleted Items bin and then select Folders &gt;&nbsp;then Recover Deleted Items. I am looking at the Deleted On date. I see messages deleted over 10 days ago. They should be flushed when maintenance runs at night. I know maintenance is running because disconnected mailboxes are disappearing after the days I have set but I don't understand why the deleted items are hanging around. Is there something else I need to set or check? 
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I am not a believer in the Deleted Items Retention feature. I have the setting configured for 1 day on the maiilbox databases. On the General tab of the Properties of the mailbox database, the setting under Deletion Settings which reads "Keep deleted items for (days): is set to 1. Yet, when Iook at some users mailboxes, I see messages in the Recover Deleted Items folder going back almost two weeks. I am opening the users mailbox on my workstation by creating a profile in my Outlook. I open the mailbox, highlight the Deleted Items bin and then select Folders > then Recover Deleted Items. I am looking at the Deleted On date. I see messages deleted over 10 days ago. They should be flushed when maintenance runs at night. I know maintenance is running because disconnected mailboxes are disappearing after the days I have set but I don't understand why the deleted items are hanging around. Is there something else I need to set or check? 

Deleted Items retention not working as expected in Exchange 2010 SP1

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.