Emails Purged From Outlook May Still Exist

After an email is deleted from the Deleted Items folder, or removed from the Inbox with SHIFT + DELETE, the email will be sent to the Deletions subfolder of the Recoverable Items Folder. The Recoverable Items Folder is not visible to the user. Each user's profile contains a deleted item retention period set by the admin. The default is 14 days. So, in most cases emails can be recovered for up to 14 days after a user has tried to delete them. The 'Recover Deleted Items' command is on the Folder tab of Outlook.

If an email is purged from the Recovered Deleted Items folder, or if the set retention period elapses, it is sent to the Purges subfolder of the Recoverable Items Folder. However, the email will not be removed from the Purges folder until the mailbox assistant processes the folder. A post on Microsoft's official site for Exchange states that: "You can configure the Managed Folder Assistant to process all mailboxes on a Mailbox server within a certain period (known as a work cycle). The work cycle is set to one day by default."

In-Place eDiscovery In Microsoft Exchange

Microsoft Exchange makes possible in place preservation of email messages. The archiving of relevant emails involves significant costs because of the need for a user to manage the copying or because of the need to purchase software to implement the hold on the email messages.

The LitigationHoldEnabled property of a mailbox will prevent any item in a mailbox from being removed.

The alternate 'in-place hold' will only direct the retention of emails which come up in a search query. A single mailbox can have multiple in-place holds, but no more than 500 search terms can be used.

Using more than 500 terms in a query will cause all content in the mailbox to be preserved. The LitigationHoldEnable property is either set or not. Either type of hold can be set to remain for a specific time period.

Searches can be run on the messages that are subject to in-place holds. While a hold is in place a user will retain the same rights to delete emails. The admin has the option of informing the user that the mailbox is subject to a hold.

Both types of holds use the Recoverable Items folder to preserve emails. So even when SHIFT + DELETE is used or emails are deleted from the Deleted Items folder, the emails are transferred to the Recoverable Items folder. The recoverable items folder is not visible to users. Note that a user does have the option to recover deleted items on the folder tab.

How ephemeral is Snapchat?

The content of ephemeral social media like Snapchat may stick around for longer than you'd guess. The basic concept behind Snapchat is that messages will be automatically deleted after they have been viewed. Once all recipients of a Snapchat message have viewed a message it is deleted from the Snapchat servers. As the policy posted here makes clear, messages which are not opened will be deleted 30 days after they are sent.

When two users communicate in a one on one chat. their messages will be deleted when the chat ends, but the settings can be changed so these messages are retained for 24 hours. Snapchats can be saved by simply pressing on a chat and holding on it until a Snapchat's background turns gray.

Snappables are inactive games multiple users can play in Snapchat. These can saved by a user in the memories archive indefinitely. The online policy makes clear that Snapchat backs up snaps saved to 'Memories'.

Snapchat also hosts online 'Stories' which are public content. This content may remain after a user has deleted their post.