The default size of a Unicode pst or ost is 20 GB (Microsoft Outlook 2003 or 2007) and 50 GB for Outlook 2010. While this size is fine for most people, it can be raised (or lowered) by editing the registry.

It’s possible to configure Outlook to automatically compact the pst every time you close Outlook. This can be useful to users who deal with sensitive data and need to ensure messages can’t be recovered as compacting removes all traces of deleted messages, making it impossible to recover the mail.

How to convert Email and Calendar to or from Microsoft Outlook format.

What you need to backup in Outlook 2010 to preserve your data and settings, and where to find the files.

A common issue with Microsoft Internet Explorer is controlling the e-mail program used when you click on a mail address on a web page. If it's not set correctly, you may get a "Can't create object" error message. In Windows 7, 8 and 10, you can set the default mail client in the Control Panel's  

How to move an Outlook data file (pst) to a new folder and configure Outlook to use it.

A last ditch effort to recover Outlook items permanently deleted from a pst file. It works only on PSTs but there is no guarantee it will work.

For best results, you should close Outlook before running backup software. $isOutlookOpen = Get-Process outlook* if($isOutlookOpen = $null){ # Outlook is already closed run code here: } else { $isOutlookOpen = Get-Process outlook* # while loop makes sure all outlook windows are closed before moving on to other code: while($isOutlookOpen -ne $null){ Get-Process outlook* |  

Configure and use IMAP accounts with Microsoft Outlook. Learn how to configure Sent items and Deleted items folders in Outlook 2007 and up.

For Microsoft Outlook 2007, see Microsoft Outlook 2007 Backup and Dual Boot File Locations. Includes file locations in Vista and Windows 7. Outlook 2010's backup information is at Microsoft Outlook 2010 Backup and Dual Boot File Locations. Where is my Microsoft Outlook data stored, people often ask? Your Outlook folders are either in a mailbox