apply server side rules to old messages

I can create folders and then rules by powershell. How can I apply server side rules to old messages? In outlook I can see my rules and apply them but it whould only work on cached mail. I can't encrease the buffer to lifetime due to the size of the mailboxes (>50gb).
Giovanni AAsked:
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Adam BrownSr Solutions ArchitectCommented:
The Powershell cmdlets in Exchange don't let you force rules to run immediately. Note, though, that a rule run in Cached mode will sync up with Exchange and the rule will effectively run against mail in the server after that sync occurs. That said, though, you can set up the Outlook profile so it isn't using cached mode, then run the rules in that profile. You might be able to script it with the Outlook Powershell Cmdlets, but there isn't an Exchange server based way to do it easily (without a lot more coding work, anyway)
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Giovanni ACommented:
Is there any onther way, also not based on rules, to get the old mail in the right folders?
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