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trinity2007

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EExchange 2010; If I set up a GPO to permenently delete older emails sufficient (autoarchive options), or do I need to set Retention Policy Tags too? If so, do I need enterprise CALs?

We are running Exchange 2010 Enterprise (standard CALs), and are looking at a cloud archiving solution.  Anything older than 1 year will be archived to the cloud.  In order to clean up the mailboxes/databases I understand we will need to set GPO's to remove items older than 1 year.  In setting the GPO, I can turn on the autoarchive function to run every <x> days and permanently delete the old items.  My question is this:  Is turning on the AutoArchive function enough to remove the older emails?  Or do I also need to set Retention Policies on the Exchange server, and if so, is it required to have Enterprise CALS?

Thank you,
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Adam Farage
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trinity2007

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Thank you for the explanation.  We are in the initial stages of setting up with an external vendor to archive anything older than one year and is set to real time mode.  I'm trying to understand what I need to do on our side to clean up emails off the exchange server older than one year.  

Questions:
    1.  Can I just use the GPO settings for Autoarchive and set it to permanently delete items older than 1 year?  Would this be enough to remove from the exchange server?  
    2.  Set Retention policies on the Exchange side.  Will this incur the cost of Enterprise CALs.
    3.  From an Exchange perspective; what benefits does setting the Retention policies on the exchange server give us vs. using the autoarchive through GPO.

Our vendor told us that we would not need to have Enterprise CALs to clean up our mail server.  They are not giving any kind of recommendations though.   I just want to know the best way to remove items older than one year from our exchange server.

Thank you for your assistance.
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Perfect...thank you for your answers.  You've been very helpful
No problem, glad to be of help!