Outlook Auto Archive Not Working? Top 5 Ways to Fix It!

The issue: Outlook auto archive not working

To keep your mailbox from filling up, Microsoft Outlook offers Archive feature to help move old items you want to keep to a separate Outlook Data File (.pst). It also offers AutoArchive feature to automate the archiving process based on a predefined frequency.

The AutoArchive feature works fine in most situations. However, some users find Outlook archive not moving emails as expected. Here is a real case:

“I created an Auto-Archive option at the beginning of September. It has run twice now at 14 day intervals, but only on a small number of my folders. How do I make it work for ALL folders and sub-folders?”

Possible reasons for Outlook not archiving emails

There are several potential reasons why Outlook's archive feature might fail:

How to fix archive not working in Outlook 2019/2016/2013

If you are confronted with the Outlook archive not working issue, you can try one of the following methods to fix it:

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# 1. Check AutoArchive settings

When AutoArchive is not working properly, the first thing we should do is to make sure the AutoArchive settings are correct.

1. Open AutoArchive settings window.

• Outlook 2007: Tools > Options > Other > AutoArchive
• Outlook 2010/2013/2016/2019: File > Options > Advanced > AutoArchive Settings

2. Make sure that the Run AutoArchive every XX days checkbox is selected and you have configured how frequently you want AutoArchive to run.

💡 Tips:

• You can set the age of the items that you want to archive in the field of “Clean out items older than XX”.
• By default, AutoArchive will move old items to an archive.pst file. You can permanently delete old items by selecting the corresponding option.

# 2. Review AutoArchive exclusions

If AutoArchive doesn’t work on one specific folder, you can verify the status of the specific item using the following steps.

1. Right click on the folder and select Properties > AutoArchive tab.
2. Make sure the Do not archive items in this folder checkbox is NOT selected if you want the items to be archived.

# 3. Run Inbox Repair Tool 

If the archive.pst file is corrupted or too large, AutoArchive may not work as expected. The Inbox Repair tool (Scanpst.exe) is designed to help repair problems that are associated with personal folder (.pst) files. Learn how to use it as follows.

Note: The Inbox Repair tool is automatically installed with all English-language Microsoft Outlook installation options depending on your operating system.

1. Exit Outlook and browse to one of the following file locations:

• Outlook 2019/2016: C:\Program Files (x86)\Microsoft Office\root\Office16
• Outlook 2013: C:\Program Files (x86)\Microsoft Office\Office15
• Outlook 2010: C:\Program Files (x86)\Microsoft Office\Office14
• Outlook 2007: C:\Program Files (x86)\Microsoft Office\Office12

2. Run Scanpst.exe. Click Browse to select the archive.pst file you want to scan.

3. Choose Start to begin the scan. If the scan finds errors, choose Repair to start the process to fix them.

# 4. Modify the ArchiveIgnoreLastModifiedTime registry value

Outlook archive works based on the last modified date and time by default. If you reply, forward, move, edit, save, or import an item, the modified date will change, which may cause the AutoArchive not to archive the item. If you want Outlook to archive items based on the received date, you need to set the ArchiveIgnoreLastModifiedTime registry value.

Note: Please backup registry in Windows before you modify the registry. Serious problems might occur if you modify the registry incorrectly.

1. Press Win + R to start Run, type regedit in the Open box, and then click OK.
2. Locate and then click the following registry subkey:

• HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences (Outlook 2019/2016)
• HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Preferences (Outlook 2013)
• HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Preferences (Outlook 2010)
• HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Preferences (Outlook 2007)

3. Right click on the empty space at the right pane. Select New, and click on DWORD (32-bit) Value. Name the new DWORD ArchiveIgnoreLastModifiedTime.
4. Double click on ArchiveIgnoreLastModifiedTime and set its value data as 1, and then click OK.

5. Exit Registry Editor and restart Outlook to make the registry take effect.

# 5. Create a new PST file for archived items

Another scenario is the PST file is full. The default limit is 20GB for Outlook 2003/2007 and the limit is 50GB for Outlook 2010/2013/2016/2019. You won’t be able to add items to the archive.pst file when the file reaches 19GB or 47.5GB. In this case, I suggest you create a new PST file to archive the items.

1. Open AutoArchive settings window as mentioned in method 1.
2. In the “Move old items to” field, click Browse to specify a new location for the archive.pst file.

Note: Don’t store the PST file on the network share, or the archiving process may fail if there are even minor interruptions in the network connection.

Bonus tips to prevent Outlook problems

Outlook errors happen now and then. Besides the Outlook archive not working issue, you may encounter the problem of Outlook PST file missing, Outlook not showing old emails, Outlook "Cannot open your default email folder", etc. To prevent data loss caused by unexpected Outlook errors, here are some useful tips you can follow:

👉 Tip 1: Auto Backup Your Outlook Mailbox

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• It supports Outlook, Gmail, Hotmail, and any other email accounts added into Outlook client.

• You are able to backup your email data daily/weekly/monthly with the “Schedule Backup” feature.

• You are allowed to run incremental or differential backup to reduce backup time and the backup image size.

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To have the backup task run automatically, you can configure it with the Schedule Backup feature.

👉 Tip 2: Keep Your Outlook Updated

Microsoft frequently releases updates for Outlook to patch bugs, enhance performance, and improve security. Outdated versions of the software may have unresolved issues that can lead to crashes, glitches, or compatibility problems with newer email services.

To prevent Outlook issues, make sure your software is always up-to-date. You can check for updates manually or set Outlook to update automatically. This will help ensure that you're running the most stable and secure version of the program.

👉 Tip 3: Monitor and Manage Your Mailbox Size

A cluttered or oversized mailbox can slow down Outlook or cause archiving and synchronization problems. Over time, email accounts accumulate large volumes of messages, attachments, and other data, which can strain your system resources.

To prevent performance issues, regularly clean up your mailbox. Archive old emails, delete unnecessary messages, and remove large attachments. Outlook also has built-in tools to help manage mailbox size, such as the “Mailbox Cleanup” feature, which makes it easy to review and reduce mailbox clutter.

👉 Tip 4: Avoid Overloading Outlook with Add-ins

Outlook supports a wide range of add-ins to enhance functionality, but installing too many can slow down performance or cause conflicts between extensions. Certain add-ins may also become incompatible after software updates, leading to glitches or errors.

To prevent issues, regularly review the add-ins installed in Outlook and disable or remove any that you no longer need. Stick to trusted, essential add-ins that are frequently updated by developers to avoid compatibility problems.

Wrapping things up

Take it easy if you find Outlook auto archive not working. This page offers you five effective methods to get it fixed. To prevent data loss caused by unexpected Outlook errors, you are suggested to backup Outlook data with AOMEI Backupper. It offers you full Outlook backup solutions. What’s more, it offers the clone feature to help you replace C drive with SSD. Why not give it a shot?