Exclude Calendar Item from Archive - exchange 2010


I am using a archival policy so all folders will archive after 6 months.
Now I want to exclude calender Items from this archival. How to achieve this.
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Adam FarageEnterprise ArchCommented:
The processing of calendar and tasks was introduced within Exchange 2010 SP2UR4. You really have two options:

1) you can create a retention policy tag (not a default policy tag) and set it to "disabled", then assign this to the calendar default folder. Afterwards assign the RPT to the retention policy in question and then force run the MFA (Managed Folder Assistant)
2) You can enter in the following registry key within Exchange, restart the server (which is my recommendation) and the allow the MFA to update automatically (or force run it):

    Path: HKLM\SYSTEM\CurrentControlSet\Services\MSExchangeMailboxAssistants\Parameters
    Name: ELCAssistantCalendarTaskRetentionEnabled
    Type: DWORD
    Value: 0 = Do not process Calendar and Task folders
    Value: 1 = Process (default with RU4)

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