Email Archiving

Exchange Online Archiving is a very useful feature for Office 365. However, very few users are actually using this feature.  If you are a user of Email, chances are that you are aware of the concept of Email archiving. What it really means is that in order to ensure that our mailbox remains within the specified limit, we remove the mails from our mailbox and store the same as a backup usually in the form of a .PST file. In many cases, this process of Email Archiving is automated whereby a user specifies that any mail beyond, say, 6 months should be archived and the PST file is then stored on his PC or on the Server.

This method is widely used. But it has certain flaws:

1) If the PST is stored in the Local Computers & the Hard Disk fails, chances are that PST will be lost along with data.

2) If the Admin makes a global search, the mails in the PST will not be searched. So Compliance & e-discovery suffers.

3) The data in the PST is available only from the Outlook of the User. If the User were to login on a different PC, then this data is not available.

To overcome these issues & to better manage the Mail Backup, we can use Exchange Online Archiving. Administrators can provision it for the users. And then the Users can see the Archive Mailbox along with the Actual Mailbox in Outlook as well as in Outlook Web Access – OWA.

Note that the Main Mailbox is 50 GB & Archive Mailbox is 50 GB. To get Archive space beyond 50 GB, we recommend Exchange Online Archiving Service.


1) The PST is stored Online. So even if local hard disk fails, the PST is Safe in the Microsoft Data Center.

2) Since it is stored in the Cloud, the Admin can make Global Search which can even Search for Mails inside PST.
3) As the PST is Online, it is available from any PC & not just from the PC of the User. 

Given below is the Snapshot of Archive Mailbox of a User in Outlook:

Given below is the snapshot of archive mailbox of the same user in a browser. Thus it can be accessed from any PC :

Archive mailbox in Browser

Given below is the snapshot showing both the main mailbox as well as the archive mailbox of the user:

Main Mailbox and Archive Mailbox

As you will now understand, the Online Archive feature in Exchange Online is very powerful tool in Email Management as well as Compliance.

To know more about Email Archiving kindly, 



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