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Cannot Display Folder Out of Memory or System Resources Outlook

  author
Published By Jamie Kaler 
Rollins Duke
Approved By Rollins Duke
Published On July 1st, 2025
Reading Time 7 Min Read
Outlook of Memory or System Resources Outlook Error is frustrating as it can affect communication and workflow. When this message appears, Outlook is unable to access the memory or system resources can’t function properly. It shows slow performance, or an inability to open emails or attachments. This issue most appears due to oversize data files, too many windows open, incompatible add-ons, or outdated software. Understanding the root cause behind this Outlook memory error is the first step to resolve it effectively and prevent future disruptions.
Table of Contents
  1. Recognizing the Error
  2. Why It Happens (Causes)?
  3. How to Repairing Outlook Profile Using Outlook Inbox Repair Tool?
  4. Advanced Troubleshooting to Solve Out of Memory or System Resources Outlook Error
  5. Alternative Approach to Fix Out of Memory or System Resources Outlook Error
  6. Preventative Best Practices
  7. Conclusion
  8. Common Questions/a>

Recognizing the Error

When Outlook runs out of memory or system resources, it may display one of several warnings that indicates the problems. Recognizing these alerts can help you to act before performance degrades or data becomes inaccessible.

Outlook Error Messages

  • Some of the typical message appears Out of Memory or System Resources Outlook Error:
  • Outlook Out of Memory or System Resources Outlook. Close some windows or programs and try again.
  • There is not enough memory to perform the whole operation.
  • Microsoft Outlook encountered a problem and needed to close it.
  • Cannot Display folder out of memory or System Resources Outlook.
  • The operation failed due to insufficient memory.

Why It Happens (Causes)?

The out of Memory or System Resources Error mostly appears due to a combination of software and system limitations. Such as:

  • Oversized Outlook data files put a strain on memory and processing power.
  • Faulty or excessive Add-ons increase Outlook’s load time and memory usage.
  • Older versions can contain bugs and also makes Outlook slower.
  • Damaged Outlook profile or mailbox files can cause memory leaks.
  • Running too many applications in parallel may exhaust available RAM or CPU.
  • Misconfigured or limited virtual memory affects how Outlook manages large tasks.

Quick Temporary Workarounds

  • Before dividing to advanced method, let’s know quick fixes to solve minor issues:
  • Shutdown unnecessary applications and close unwanted browser tabs to free up Memory. Also, limit the number of emails or calendar items when you keep open in Outlook.
  • Avoid opening multiple message windows or switching across folders too quickly. Keep Outlook focused on one task to reduce resource strain.

Advanced Troubleshooting to Solve Out of Memory or System Resources Outlook Error

If quick fixes don’t work, you can take help of advanced troubleshooting to fix Out of Memory or System Resources Outlook Windows 11.

Method 1. Run Outlook Inbox Repair Tool

  1. Navigate to: C:\Program Files(x86)\Microsoft Office\root\Office16\SCANPST.exe
    Open Outlook Inbox Repair Tool(SCANPST)
  2. Launch it on your machine and select the OST file as you want to repair.
  3. Press on the Repair button and after the complete process press Ok.
    Press Repair button

Method 2. Remove or Archive Unwanted Files

  1. Archive old emails or split large PST files.
  2. Go to file and click on Account Settings.
    Click on Account Settings
  3. Press on Data files and remove it.
    Click on data files

Method 3. Reduce PST Cache Size via Registry

  1. Press Win+R and type regedit.
    Type Regedit
  2. Navigate to Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\8.0\Outlook\PST.
    PST folder
  3. Set or Adjust Max file size and Warn size values.
    Set MaxLargeFileSize

Method 4. Increase Memory Heap Quota via Registry

  1. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution
    Options\OUTLOOK.EXE.
    Navigate to Outlook EXE
  2. Create and Edit Use LargeHeap DWORD and set its value to 1.
    Edit DWORD Value

Method 5. Recreate OST/PST Data File

  1. Close Outlook.
  2. Rename or Remove OST files.
  3. Now, Relaunch Outlook to rebuild the OST file.
    Relaunch Outlook
Method 6. Repair Office Installation or Update Outlook
  1. Go to the Control Panel and click on Programs.
    Click on Programs and features
  2. Press on Office and Choose Repair.
  3. Or update, navigate to file and click on Office Account.
    Click on Office Account
  4. Hit on Update Options and tap on Update Now.
    Click on Update Now
Method 7. Disable Problematic Add-ins
  1. Tap Win+R and type Outlook.exe /safe.
    Open Outlook Safe Mode
  2. Navigate to file and click on options.
    Click on options
  3. Press on Add-ins and click on COM: Add-ins.
    Click on Add-ins
  4. Tap on Go to select faulty Add-ins.
    Choose Suspicious add-ins
  5. Relaunch Outlook.
    Open Outlook
Alternative Approach to Fix Out of Memory or System Resources Outlook Error

Cannot Display folder out of memory o system resources Outlook error most appears due to OST file when it gets corrupted. In this situation, we recommend you to choose RecoveryTools OST to PST Converter as this software can easily handle batch numbers of OST files and offer fully maintained data without any modifications.

  1. Download and follow-on screen instructions to install Recommended Software.
    Out of Memory or System Resources Outlook Error
  2. Click on Select Configured Outlook mailbox data.
    Select configured Outlook files
  3. Choose OST mailbox folders as you want to convert.
    Browse Outlook folders
  4. Select PST file in the list of export options and browse PST filters.
    Select PST file
  5. Now, Select destination path and advanced filter for specific mailbox selection.
    Select destination path
  6. Press Convert button to get a healthy PST file and can be easily imported on any Outlook profile.
    Press Convert button
Useful Features of Recommended Software
  • You can also convert OST to PDF, EML, MBOX, CSV, TXT, PST and many more.
  • This software can easily restore and convert dismounted, damaged, oversize and inaccessible OST files.
  • It is specially developed with advanced algorithms to make it a reliable tool for all professional and individual users.
  • You can easily import OST to Outlook with maintained attributes.
  • With this wizard, you will get a UNICODE PST file to easily access on all versions of Microsoft Outlook.
  • This software can easily convert batch OST files without installing Microsoft Outlook.
Preventative Best Practices
  • Clear Outlook cache files to free up system resources. Close Outlook and navigate to C:\Users\Admin\AppData\Local\Microsoft\Outlook and delete the RoamCache file to remove cache data.
  • Too many active Add-ins can slow Outlook and consume storage. Open file and press options and remove unwanted Add-ins and only keep those you truly used in daily tasks.
  • Relaunch Outlook periodically to clear temporary memory buildup. Keeping Outlook open for extended periods can lead to high memory usage, especially after heavy emailing or folder syncing.
Conclusion

Let’s sum up as we have shared all crucial information to fix Out of Memory or System Resources Outlook Error. First, try quick fixes and advanced troubleshooting but if errors are not resolved then it may happen due to a corrupted OST file. So, we recommend you to choose Recommended Software as it can easily offer healthy Outlook files and can be easily imported on any Outlook profile or account.

Common Questions

Why is Outlook Saying I am Out of Storage?

Outlook says I am out of storage due to your mailbox OST files having reached a higher limit. Large attachments, old emails, or sync folders can fill quick space quickly.

How do I Resolve a Memory Full Issue in Outlook?

To fix memory full issues in Outlook, close unused applications, reduce active Outlook windows, disable unnecessary add-ons, repair Outlook and archive files. Relaunching Outlook to update Office can also help to manage memory usage effectively.

How do I Clear my Outlook Memory?

Clear Outlook memory by deleting temporary cache files. Close Outlook, go to %localappdata%\Microsoft\Outlook and remove files in the RoamCache folder. You can also reduce data file sizes and disable unused add-ins to improve performance.