Tip 70: Unread Message Count

Tip 1: Assigning Categories
Tip 2: Removing Categories
Tip 3: Calendar Views
Tip 4: Dates & Times
Tip 5: Date and Time Shortcuts
Tip 6: Printing a Calendar
Tip 7: Automatically Create Contacts
Tip 8: Using Templates
Tip 9: Web Beacons
Tip 10: Dynamic Distribution Lists
Tip 11: Save a Message thread
Tip 12: Add More Holidays
Tip 13: Hyperlink Toolbars
Tip 14: Outlook trivia
Tip 15: Outlook 2003 Unicode PST
Tip 16: Outlook's Startup Folder
Tip 17: Import and Export
Tip 18: Using AutoResolution
Tip 19: Resolving Addresses
Tip 20: Check Names
Tip 21: Safe Lists
Tip 22: Using Word Editor
Tip 23: Using AutoComplete
Tip 24: Using Rules Wizard
Tip 25: Sharing Contacts
Tip 26: Attachment Directory
Tip 27: SecureTemp Folder
Tip 28: Outlook's MRU lists
Tip 29: Compressed Weekend Days
Tip 30: Burning PSTs to CD
Tip 31: Using HTTP with Outlook
Tip 32: Using Extended Characters
Tip 33: Using Outlook's Autoarchive
Tip 34: Using Automatic Formatting
Tip 35: Outlook's Preview Pane
Tip 36: Resend Sent Messages
Tip 37: Use AutoArchive to Delete
Tip 38: Open and Save Attachments
Tip 39: View a Sender's Address
Tip 40: Store Sent Messages
Tip 41: Day of the Week
Tip 42: Stop Processing More Rules
Tip 43: Save Changes to Attachments
Tip 44: Use Maps with Outlook
Tip 45: Send Attachments in Windows
Tip 46: Command Line Switches
Tip 47: Merging Calendar folders
Tip 48: Go To Date
Tip 49: Creating Advanced Filters
Tip 50: Preview Office System 2003
Tip 51: Fire Reminders in Any Folder
Tip 52: EULAs for Office System 2003
Tip 53: Saving your Office Activation
Tip 54: Drag and Drop Forwards
Tip 55: Outlook 2003's Junk Mail filter
Tip 56: Using Outlook's Infobar
Tip 57: Antivirus Scanners and Email
Tip 58: Use Meeting Requests
Tip 59: Run Scripts in Folders
Tip 60: Restore the Desktop Icon
Tip 61: Understanding Local Installation
Tip 62: Outlook 2003's Spam filter
Tip 63: Outlook 2003 and MSMail
Tip 64: Address Book Order
Tip 65: Saving Custom Categories
Tip 66: Outlook Newsreader
Tip 67: Office Beta Expiration
Tip 68: Compacting Outlook's PST
Tip 69: Get a Free AntiVirus
Tip 70: Unread Message Count
Tip 71: Replacing MSNBC's OL Today
Tip 72: Customer Feedback Tool
Tip 73: Update Outlook's junk mail filter
Tip 74: Using Simple Find
Tip 75: Sorting the Address book
Tip 76: How much can Outlook hold?

Outlook 2003 gives you the option to show total number of messages in the folder in green brackets "[5]" and unread message count shown in blue parenthesis "(3)".

Right click on the folder in the folder list and choose properties. Select which number to display from the General tab.