Retention time Exchange 2010 not working

I'm running an Exchange 2010 server (14.3 (build 123.4). After cleaning mailboxes all boxes having a "Recoverable Items" folder wich contains mails older then the retention time. Also set the retention time to 0 days. Still all mails are available in the recoverable items folder. Whats to do?
sitproAsked:
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Jeff PerryWindows AdministratorCommented:
Did you restart your exchange services after setting the new retention time?
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Gareth GudgerCommented:
By default the cleaning process run by the Managed Folder Assistant only runs once a day. How long ago did you make these changes?

More info here.
http://technet.microsoft.com/en-us/library/bb123958.aspx
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sitproAuthor Commented:
I did the change a week ago and after that there where serval reboots
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Jeff PerryWindows AdministratorCommented:
Yeah that is plenty of time and restarts. You may have the issue described here.

http://msexchangeguru.com/2013/03/29/totaldeleteditemssize/
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sitproAuthor Commented:
@Jeff

Great, this is the solution! I test it with one useraccount with the ESM. Now i need to know how i can do that for all my Exchange users. Maybe you know how to do that?

Many thank!
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