Before we turn on the retention policies, my CIO would want to know the savings would be in turning on the retention policies. Is there a way to see to see what would be the savings that would be set should we enable it before we enable it based on each mailbox. --Tracy

Hi Tracy, Could you explain your requirements in detail? What your meaning of “the savings would be in turning on the retention policies”? Do you mean that you want to do a backup before you turn on the retention policies? If you want to save all the items in the mailboxes, you need to backup before you turn on the retention policy. If I misunderstand on you, please explain your requirements and problem in detail, that we can help you more efficiently. Thanks, Evan Liu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Evan Liu TechNet Community Support

Evan: I wanted something similar to get-mailboxstatistics in pulling item counts and data size. However, I would like to do this prior to enabling the retention policies so that my CIO would have an idea of what would be either deleted or archived prior to us turning on the retention policieis. We do constant backups but he was looking toward the space freed as well as the age of items in people's mailboxes. --Tracy

Hi Tracy, If you want to know the ItemCount and TotalItemSize for all mailboxes, you can use this command: Get-Mailbox –ResultSize unlimited | Get-MailboxStatistics| Select DisplayName, ItemCount, TotalItemSize Thanks, Evan Liu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Evan Liu TechNet Community Support

Evan: I understand that the get-mailboxstatistics will pull all of the information for the entire mailbox. All i wanted to do is if i enable a 6 month retention policy on the mailbox, i would like to know what savings (as far as disk space and items) I would save before enabling the policy. Is there a way of doing this short of running it and then running the get-mailboxstatistics after the policy is enabled. --Tracy

Hi Tracy, i would like to know what savings (as far as disk space and items) I would save before enabling the policy. I understand that you want to know how much disk size will be saved after you enable the policy, right? If so, this depend on what retention Action you have sat, I don’t know there is any command that can help you check this before you enable the retention Policy. Is there a way of doing this short of running it and then running the get-mailboxstatistics after the policy is enabled. Maybe you can use a script to do that. Thanks, Evan Liu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Evan Liu TechNet Community Support

Hi Tracy, Any updates on this issue? Thanks, Evan Liu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Evan Liu TechNet Community Support