AutoArchive not working in MS Outlook – How to fix?

When Outlook AutoArchive is not working, old emails may stay in the Inbox, Sent Items, or other folders even after they pass the expected archive age. However, it is designed to move older emails and other Outlook items to an archive location automatically.

As it can help keep your mailbox organized and reduce the amount of old data sitting in active folders, there would be a real hassle if it doesn’t work. In this write-up, we will discuss reasons for AutoArchive not working in Microsoft Outlook and how this issue can be fixed.

What is AutoArchive in Outlook? A Brief Overview

In Classic Outlook, AutoArchive is a feature that automatically processes older Outlook items based on an age (number of days) you specify. As per the settings you made for AutoArchive (for archive or deleting older emails), Outlook can either move older items to an archive PST file or permanently delete items that have passed their configured aging period.

Unlike the Archive button, it is simply different. Means, when you manually archive a message, you choose the message and move it to the Archive folder. AutoArchive, on the other hand, works automatically according to its configured rules.

The default location of the Outlook AutoArchive file (archive.pst) in modern versions of classic Outlook for Windows is:

C:\Users\YourUserName\Documents\Outlook Files\archive.pst.

The default location of the Outlook AutoArchive file in Windows Vista, 7, 8, 10, and 11:

C:\Users\<Your-Username>\Documents\Outlook Files\archive.pst (or C:\Users\<Your-Username>\My Documents\Outlook Files\archive.pst)

The default location of the Outlook AutoArchive file in Older Windows Versions (XP):

C:\Documents and Settings\<Your-Username>\Local Settings\Application Data\Microsoft\Outlook\

Note: AutoArchive is not available in new Outlook for Windows or web (OWA). You can still manually use the Archive feature, but the Classic Outlook AutoArchive settings are not available.

7 Methods to Fix Outlook AutoArchive Not Working

There are several methods to fix AutoArchive not working. Before you start, check which Outlook you are using because if you’re using New Outlook instead of Classic, you may not find this feature due to its unavailability. Also, make internet connection stable and update your Outlook. Now go through the methods below and check what works for you:

Method 1: Make Sure AutoArchive is Enabled

After you find AutoArchive not working in Outlook, the first thing you must do is check whether AutoArchive is actually turned on. Follow the steps below in Classic Outlook:

1. Open Outlook, tap on File, then go to Options.
2. Select Advanced, find the AutoArchive section, and click AutoArchive Settings.
3. Enable Run AutoArchive every n days and choose how often you want AutoArchive to run.
4. Check the remaining archive options and click OK.

Note: If the AutoArchive option is missing completely, don't keep changing settings. Check your Outlook version first. If you are using the new Outlook, AutoArchive is not supported there.

Method 2: Open Outlook in Safe Mode to Disable Add-ins

When AutoArchive is not appearing, you’ll need to disable COM add-ins blocking AutoArchive. For the same, follow these steps: 

1. Close Outlook completely, press Windows + R, type Outlook.exe /safe, and then press Enter.
2. Outlook will start in Safe Mode. Go to File, then Options, then Add-ins, choose COM Add-ins in the Manage box, and select Go.
3. Deselect all add-ins and click OK.

Restart Outlook. If AutoArchive appears or runs, re-enable add-ins one by one to identify which add-in causes the behavior. 

Method 3: Disable ‘Do not Archive Items in This Folder’ Option

If AutoArchive works for some folders but not another, check the settings for that individual folder. Classic Outlook allows folders to have their own AutoArchive configuration.

1. Open Outlook, right-click on any folder, be it Inbox, Outbox, etc.
2. Select Properties and go to the AutoArchive tab.
3. Disable Do not Archive Items in this folder if enabled.
4. Enable the other setting, Archive this item in the folder using defaults setting, or manually configure the settings. Click OK.

Note: Microsoft specifically provides folder-level AutoArchive settings, so changing the global AutoArchive settings does not necessarily mean every folder is using the same configuration. For each folder in Outlook, you must check and disable the option Do not Archive Items in This folder because, if it is enabled, it may prevent AutoArchive from processing that folder. Instead, select the option Archive this item in the folder using defaults setting or manually configure the setting. This is especially useful when Outlook AutoArchive is not working for one folder but works for others.

Method 4: Modify Registry Setting to Fix AutoArchive

By modifying the registry setting Value named ArchiveIgnoreLastModifiedTime, you can also fix AutoArchive not working. Follow these steps:

1. Press Windows + R, type regedit in the Run window, and then press Enter.
2. The Registry Editor will open. Navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences. 
3. On the right side, right-click and create a new DWORD (32-bit) Value named ArchiveIgnoreLastModifiedTime. 
4. Double-click and open that value, set it to 1, and close Registry Editor.

Restart Outlook and then look for the AutoArchive option. 

Method 5: Ask Admin for Microsoft 365 or Exchange Retention Policies

Apart from your local Outlook settings, Archive and AutoArchive may not be available when an Outlook profile connects to Exchange Server, because your organization's mail retention policy may override AutoArchive.

If the AutoArchive option is missing, unavailable, or behaves differently from what you configured, contact your Microsoft 365 or Exchange admin and ask whether an organizational retention policy is affecting the mailbox. Do not assume that changing the local AutoArchive settings will override an organization-level policy.

Note: You can also ask your IT administrator to submit a support request directly to the Microsoft Support team for guidance to fix Outlook AutoArchive not working issue.

Method 6: Check Default Archive PST File Location

By default, Outlook AutoArchive stores archived items in a PST file at the location:

C:\Users\YourUserName\Documents\Outlook Files\archive.pst

However, the exact archive PST file location can differ if you previously selected another archive destination. If the archive PST has been moved, renamed, disconnected, or is no longer accessible, Outlook may have trouble working with the archive.

In this situation, check the AutoArchive settings and confirm that the configured archive location is valid. Also make sure the drive containing the PST is available and that you have permission to access the file.

Method 7: Repair a Corrupted Archive PST

Sometimes the problem is not AutoArchive or its configuration itself. Outlook may be configured correctly, but the archive PST file may be damaged under certain conditions. The destination archive file gets corrupted somehow due to improper management. Archived emails go missing, the PST won't open, and Outlook displays errors.

To get rid of such hassle, make a copy of the original PST file and try using Microsoft's Inbox Repair Tool (SCANPST.EXE) to check and repair certain Outlook data file problems. It can find and repair PST files.

However, SCANPST may not be enough when the PST is severely corrupted or when you need to recover as much mailbox data as possible from a damaged archive.

In situations like SCANPST.exe failure or severe Outlook PST file corruption, a dedicated utility, Kernel Outlook PST Repair tool, can help to repair and retrieve all your archived data available in a corrupted PST file. With it, all your mailbox data, including emails, attachments, contacts, calendars, and other Outlook items, becomes accessible so that you can import it into Outlook again.

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Key Takeaways

Now, we hope that you understand how to fix Outlook AutoArchive not working and the reasons why it occurs. If Outlook AutoArchive is not working, don't immediately assume that Outlook is the main culprit. First, check the internet connection and the Outlook version. If you're using the new Outlook for Windows, AutoArchive isn't supported. If you're using Classic Outlook, check the AutoArchive setting along with folder-specific settings, the archive PST location, modify registry settings, and try disabling add-ins.

For Microsoft 365 and Exchange accounts, also consider organization-level retention policies. If the settings are correct but the archive PST itself is inaccessible or corrupted, the problem may be with the Outlook data file rather than AutoArchive. Repair the archive PST file, get all your existing data, and map the same file in the AutoArchive settings to archive further emails.