Fix Outlook AutoComplete Not Working Correctly

The autofill feature is an important part of the Outlook program. AutoComplete allows you to enter an entire email while composing a message with just one email initial. This feature helps you save time and gives you quick access to emails. However, sometimes users may experience Outlook AutoComplete not working issue; this issue can be caused for various reasons, such as an outdated Office version or bugs with the Outlook program. In this guide, we will discuss methods to resolve Outlook Address AutoComplete not working issue on your Outlook.

How to Fix Outlook AutoComplete Not Working Correctly

There can be various reasons for Outlook Autofill email address not working on your Outlook account; some of the most common reasons are mentioned here.

• If you have disabled AutoComplete in Outlook, you won’t be able to use this feature.
• Bugs and glitches with the Outlook program can also cause this issue.
• Issues with a user profile can also cause AutoComplete feature not working issue.
• Corrupt Outlook Add-ins can also cause this issue.
• Corrupt Outlook data PST files can also cause this issue with Outlook.
• Outdated or corrupt Microsoft Office updates can also cause this issue.
• A corrupt RoamCache folder can also cause this issue with Outlook.

Following are the troubleshooting methods to solve this problem.

Method 1: Enable AutoComplete in Outlook

If you have not enabled the AutoComplete feature in Outlook, you will not be able to use this feature. You will have to manually enable AutoComplete to resolve this Outlook address AutoComplete not working issue. You can follow these simple steps to enable AutoComplete in Outlook.

1. Open Outlook, and navigate to File from the top-left side of the window.

2. Here, from the left-side panel, click on Options.

3. Navigate to the Mail tab.

4. Scroll down here, and locate Send messages options.

5. Here, check the Use Auto-Complete List to suggest names when typing in the To, Cc, and Bcc lines.

6. If you find this option already checked, click on the Empty Auto-Complete List.

7. Click Yes to confirm the action.

Method 2: Run Outlook in Safe Mode

Running programs in safe mode can help you avoid various issues. You can use safe mode to make the troubleshooting process easier and avoid hardware issues. You can follow these simple steps to run Outlook in safe mode to resolve Outlook autocomplete not working issue.

1. Press Windows + R keys to open the Run dialog box.

2. In the Run dialog box, type Outlook.exe/safe and press the Enter key.

Also Read: Fix Outlook Trying to Connect to Server on Windows 10

Method 3: Run Outlook with Different Profile

Make sure the Outlook issue is happening only in your Outlook program and not on the entire system. You can try to log in to Outlook with a different profile. You can also add a different account on Outlook.

1. Open Outlook on your computer, and click on File.

2. In the Account Information page, locate and click on Add Account.

3. Enter the login credentials for a different account.

Method 4: Disable Outlook Add-Ins

Sometimes, the issue can be caused by an Outlook Add-in. Ad-ins can be very useful and help you organize your Outlook application. However, if Outlook Add-ins get corrupt for some reason, you may experience various issues, such as AutoComplete not working on Outlook. To resolve these issues, you can try to disable Outlook Add-ins. You can follow these simple steps to disable Outlook Add-ins.

1. Open Outlook on your computer and navigate to File.

2. Here, from the left-side panel, click on Options.

3. Now, locate and navigate to Add-ins.

4. Here, locate the Manage drop-down and select COM Add-ins.

5. Now, click Go.

6. Here, uncheck all the Add-ins and then click OK.

Method 5: Repair Outlook Data PST File

PST, or Personal Table Storage, files store Outlook emails; if this file is corrupt or causing issues, you may experience Outlook address AutoComplete not working error. You can use the Inbox repair tool to help you figure out a solution for this issue. Follow these simple steps to execute this method.

1. Open the Outlook folder on File Explorer.

C:\Program Files\Microsoft Office\root\Office16 

2. Click on the SCANPST.EXE file.

3. Now, select the Browse option to locate the file you wish to scan.

4. In the new dialog box, click on Start.

5. Finally, click Repair to fix all the PST file issues.

If this method does not fix Outlook autocomplete not working issue, move on to the next method.

Also Read: How to Recover Deleted Draft in Outlook 365

Method 6: Update Microsoft Office

If the Microsoft Office program is experiencing bugs and glitches, updating it can help you fix the issues. An outdated Microsoft Office can make your Outlook vulnerable to bugs and other application issues. Therefore, manually updating Office is a great way to fix not just the AutoComplete issues but also other underlying issues with the Microsoft Office package. You can follow these simple steps to update Microsoft Office from the Microsoft Outlook program.

1. Open Outlook on your computer and navigate to Files.

2. From the left-side panel, click on the Office Account.

3. Here, locate Office Updates.

4. Now, click on the Update Options drop-down.

5. Finally, click on Update now.

If this method does not fix Outlook Autofill email address not working issue, move on to the next method.

Method 7: Rename RoamCache Folder

If you have enabled the AutoComplete feature but still have the issue, it can be due to a corrupt RoamCache folder. You can fix this issue by resetting the AutoComplete folder. You will only need to rename the RoamCache folder in the directory. You can rename the RoamCache folder for both, a home email account and a Microsoft Exchange server account.

Option I: Rename RoamCache Folder for Home Email Account

You can follow these simple steps to rename the RoamCache folder in a home email account.

1. Open Outlook on your computer and navigate to File.

2. Now, click on the Account Settings drop-down and then select Account Settings.

3. Here, select your Home Email Account.

4. Close the Outlook program.

5. Press Windows + E keys to open File Explorer.

6. Navigate to the following location path.

%LOCALAPPDATA%\Microsoft\Outlook

7. Here, locate the RoamCache folder.

8. Rename this folder with a new name.

Also Read: Fix Your Microsoft Exchange Administrator Has Blocked This Version of Outlook

Option II: Rename RoamCache Folder for Microsoft Exchange Server Account

You can follow these simple steps to rename the RoamCache folder in a Microsoft Exchange server account to solve Outlook address AutoComplete not working issue.

1. Open Outlook on your computer and navigate to File.

2. Now, click on the Account Settings drop-down and then select Account Settings.

3. Here, select your Microsoft Exchange Server Account.

4. Now, click on Change.

5. Here, click on More Settings.

6. Navigate to the Advanced tab.

7. Unselect the Use Cached Exchange Mode box and select Next.

8. Finally, click Finish.

9. Close the Outlook program.

10. Press Windows + E keys simultaneously to open File Explorer.

11. In the File Explorer, navigate to the following location path.

%LOCALAPPDATA%\Microsoft\Outlook

12. Here, locate the RoamCache folder.

13. Rename this folder to old_RoamCache.

14. Now, open the Outlook program and follow the steps mentioned above to navigate to the Use Cached Exchange Mode option.

15. Check the Use Cached Exchange Mode.

16. Finally, restart the Outlook app. 

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We hope this guide was helpful to you and you were able to fix Outlook AutoComplete not working issue. Let us know which method worked for you. If you have any suggestions or queries for us, please let us know in the comment section.