Frequently Asked Question

Support Guide: How to Remove Cached Email Addresses in Microsoft Outlook

When your email address or your contacts' email addresses change (such as the transition to @fmu.edu), Outlook may try to autofill old, invalid addresses from its cache. This can result in failed email deliveries or messages going to the wrong domain.

Use this step-by-step guide to clear outdated or incorrect email address entries in Outlook's autocomplete cache.

For Outlook Desktop (Windows)

Option 1: Remove Individual Cached Entries

1. Open a new email message.                                      
2. Begin typing the email address (e.g., your old address or a contact's old address).
3. When the incorrect suggestion appears in the dropdown:
   • Click the X to the right of the suggestion.
   • Or press the Delete key when the suggestion is highlighted.                      

Option 2: Clear the Entire Auto-Complete List

1. Open Outlook.
2. Go to File > Options.                                                                    
3. Select Mail from the left-hand menu.
4. Scroll down to the Send messages section.
5. Click Empty Auto-Complete List.
6. Click Yes to confirm.                                                        
7. 

Note: This will clear all cached addresses, not just the old domain ones.

For Outlook on the Web (OWA)

1. Go to https://outlook.office.com and log in.                                      
2. Click New mail to start a new message.                                            
3. Begin typing the address you want to remove.                                                     
4. Use the arrow keys to highlight the incorrect suggestion.
5. Press the Delete key or click the X next to the suggestion.

For Outlook Mobile App (iOS/Android)

Cached addresses cannot be individually deleted on mobile. Instead:

1. Remove and re-add the email account under your phone's account settings.
2. Alternatively, reinstall the Outlook app.

Tip: This also ensures that your mobile app uses the new domain for login and syncing.

Still Having Issues?

If you're still unable to send emails or see the correct suggestions, contact the CyberZone:

• Email: cyberzone@fmuniv.edu

We're here to help!