Outlook can display either the number of unread e-mails or the total number of e-mails in a folder alongside the folder name.
This option controls which address book you see when you open the Address Book (via clicking Ctrl+Shift+B) and when you click the To, Cc, or Bcc buttons when composing e-mails.
Even if you are not an Exchange user, you can send a copy of your calendar in an email message so people will know when you are available.
This tip shows how to open the Calendar sent to you.
There are several Outlook startup switches. The most common switches are listed in this tip.
This tip shows how to create and add custom holidays, for example, of your company to the Outlook calendar.
By default, if Reading pane is opened, Outlook opens replies and forwards in the same window, but you can fix this behavior and open them in a new window.
Outlook rules could be exported and imported from file. E.g., you can export rules to a file, send this file as an e-mail attachment or place it on a network share (or a local share) for backup purposes or to allow other users to access it.