Need to report on all of the individual folders within a mailbox, returning such information as their size within a date range.

I was asked to take a look at the mailbox to inventory the size and dates of the mail to see what archiving policy would reduce the mailbox size by at least 50-70%. If this user has 45GB in the last 6 months, then a 1 year policy won’t be of much value and I think that the user won’t want anything less than a year. I need to find a report mailbox folder sizes with PowerShell within a date range. I think I should use the Get-MailboxFolderStatistics -identity cmdlet but not certain. Can you help?
Olga BarannikAsked:
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You're correct, Get-MailboxFolderStatistics will provide your with the required info, example:
Get-MailboxFolderStatistics -Identity username | ft FolderPath, FolderSize

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Olga BarannikAuthor Commented:
Thank you. I think my question wasn't clear thought. I need to calculate the size of all items in mailbox within a date range. For instance, I need the total size of items from 1/1/16 to 1/1/17. Do I need to open a different question?
Olga BarannikAuthor Commented:
I think I just need a date range for this -
get-mailbox -Identity username | Get-MailboxStatistics | select-object TotalItemSize?
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