These articles are in the Developer and Code Sample categories. These pages often contain only the code, with very little instructions and assume the reader has some VBA knowledge. See How to use the VBA Editor if you need help using VBA.
Additional code samples are at VBA Code Samples
Change the Mailing Address Using PowerShell
How to use PowerShell to bulk change the Mailing Address selector (or move the address to a different address field) in classic Outlook's contacts.
Save Selected Email Message as .msg File
A VBA code sample to save one or more selected messages to your My Documents folder as .msg files, using the received date and time as the filename.
Resize images in an Outlook email
Use a VBA macro to resize large images in received email.
Send an Email When You Open Outlook
Today's entry in the Fun with Programming series is a macro to send a message every day when you first open Outlook.
Get Outlook's Internet Headers using VBA or PowerShell
Use this code sample and function to display the Internet header of selected message in a new message form.
Save and Rename Outlook Email Attachments
Use a macro to save attachments on Outlook email messages to a folder on your hard drive and add the files last modified date to the filename.
Delete duplicate messages using a macro
Use a macro to clean up duplicates messages in an Outlook folder.
Use VBA to Scan to Email
How to scan a document or image and attach or embed into an Outlook email using VBA and the Windows Image Acquisition Library (WIA).
Shortcuts to open Outlook folders
Outlook doesn't support creating shortcuts to folder on the Quick Access toolbar (QAT) or ribbon, but you can put macro on the QAT or ribbon that opens a folder.
Warn Before Deleting a Contact
The code samples on this page ask for confirmation before a contact is deleted. This way you don't need to retrieve the contact from the Deleted items folder and move it back to the contacts folder. The first code sample works with selected contacts, the second one works with opened contacts. You can use both
Fix the Outlook Folder Type after Exporting an IMAP Account
After importing IMAP folders to Personal Folders or an Exchange mailbox, messages in the imported folder are hidden.
Macro to Add or Remove a Category
Use a macro to toggle a category on and off on a Microsoft Outlook email message.
Export (Save) Outlook Contact Photos
Use VBA to export a photo from a contact and save it to the hard drive. Use a second macro to add the photo to a new contact.
Use PowerShell or VBA to get Outlook folder creation date
Use PowerShell or VBA to get the creation date of a folder in Outlook desktop software.
Macro to Resend Sent Message
How to use a macro to resend a sent message in Outlook 2013 and Outlook 2016.