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Creating a Mailbox Folder Growth Map with Powershell, EWS and eDiscovery

I've posted before on Exchange 2010 about how you can use AQS to produce a mailbox Item Age and Size reports. This same method can be used and enhanced on 2013 using eDiscovery to produce a growth report. Eg something like this that shows the mailbox growth for each folder (that has grown) based on the size of the Items in the folder for that month and an ASCII graph to show the growth vs the FolderSize So to do this the follwing script uses eDiscovery on 2013 or Exchange Online to make a query of all the items in the primary mailbox over the period of 12 months using the following KQL query received:2013-01-01..2014-01-01 Which queries for items that where received between these two dates, in the script I have variables to calculate this to give the exact 12 month period eg $KQL = "received:" + $StartDate.ToString("yyyy-MM-dd") + ".." + $EndDate.ToString("yyyy-MM-dd"); The rest of the script is another variant of my eDiscovery t...
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