Hotfix suggestions for increasing PST file size in Outlook 2007

November 08, 2020 by Owen Faunce

 

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This guide describes some of the possible causes that might cause the .pst file to grow in size in Outlook 2007. It then presents some possible fixes that you can try to resolve the issue. The maximum size for a .pst file in Outlook 2007 and Outlook 2003 is 20 GB.

 

 

Step 1. Open the registry editor.

1. Open the Run command, type Regedit in the Run search box and press Enter.

Step 2. Change the size limit for Outlook PST through the registry.



1. Look in the Registry Editor in the left pane and navigate under Computer to the following registry path that matches your version of Outlook:

For unique users:

  • Outlook 2013: HKEY_CURRENT_USER \ Software \ Microsoft \ Office \ 16.0 \ Outlook \ PST
  • Outlook 2013: HKEY_CURRENT_USER \ Software \ Microsoft \ Office \ 15.0 \ Outlook \ PST
  • Outlook 2010: HKEY_CURRENT_USER \ Software \ Microsoft \ Office \ 14.0 \ Outlook \ PST
  • Outlook 2007: HKEY_CURRENT_USER \ Software \ Microsoft \ Office \ 12.0 \ Outlook \ PST
  • Outlook 2003: HKEY_CURRENT_USER \ Software \ Microsoft \ Office \ 11.0 \ Outlook \ PST

For administrators: (via group policies)

  • Outlook 2013: HKEY_CURRENT_USER \ Software \ Policies \ Microsoft \ Office \ 16.0 \ Outlook \ PST
  • Outlook 2013: HKEY_CURRENT_USER \ Software \ Policies \ Microsoft \ Office \ 15.0 \ Outlook \ PST
  • Outlook 2010: HKEY_CURRENT_USER \ Software \ Policies \ Microsoft \ Office \ 14.0 \ Outlook \ PST
  • Outlook 2007: HKEY_CURRENT_USER \ Software \ Policies \ Microsoft \ Office \ 12.0 \ Outlook \ PST
  • Outlook 2003: HKEY_CURRENT_USER \ Software \ Policies \ Microsoft \ Office \ 11.0 \ Outlook \ PST

Note. If the PST key is missing under the Outlook key, you need tocreate it manually. To do this:


how to increase pst file size in outlook 2007

a. Right-click the Outlook button and select New> Button from the menu that appears.

b. Enter a name on the new key: PST.

2. Double click the PST button and find these two (2) values ​​in the right pane: *

  1. MaxLargeFileSize
  2. WarnLargeFileSize

Note. If the above values ​​cannot be found in the registry, you will have to create them manually. To do this:

a. Right click in the right pane and select from the menu that appears: New> DWORD Value

b. Enter a name for the new value: MaxLargeFileSize

in. Repeat the above process (2a) and create a new DWORD value named: WarnLargeFileSize

3. Double-click the MaxLargeFileSize value, select Decimal, and enter the new file size in megabytes (MB) into these values. *

Reminder:

  • In Outlook 2003 and 2007, the default size limit for Outlook PST is 20 GB, so you must specify a size greater than 20 GB.
  • In Outlook 2010, 2013, and 2016, the default PST file size limit is 50 GB, so a size greater than 50 GB must be specified.

Note. 1 GB = 1024 MB, 30 GB = 30720 MB, 50 GB = 51200 MB, 70 GB = 71680 MB, 100 GB = 102400 MB

In our example, we are increasing the size limit for Outlook PST to 30 GB for Outlook 2003 and 2007 and 100 GB for Outlook 2010, 2013, 2016)

* In our example: 30720 for Outlook 2003 and 2007 and 102400 for Outlook 2010, 2013 and 2016.

4. Then double-click the "WarLargeFileSize" value, select "Decimal" and enter the new size of the warning file in megabytes (MB) in the data value. *

Warning: This value must represent at least 95% of the MaxLargeFileSize (MaxLargeFileSize X 95%)

* In our example: 30720 x 95% = 29184 for Outlook 2003 and 2007 and 102400 x 95% = 97280 for Outlook 2010, 2013 and 2016.

5. Close Registry Editor and you're done!

What Other Options Do Users Have?

The above method is best for increasing the maximum size of PST and OST files. However, if you focus on large files, it can slow you down or cause damage. You can also split or compress PST. With professional method, users can split PST files according to their needs, compress PST files, secureIt is important to reduce their size and effectively delete large PST files. Shoviv PST Management Suite is a versatile all-in-one PST software that expertly manages all PST tasks. Download it and try the free trial / demo to see how it works


December 2020 Update:

We now suggest using this software program for your issue. Also, Reimage repairs typical computer system errors, defends you from file loss, malicious software, computer system failures and optimizes your Pc for maximum performance. You can fix your Pc challenges swiftly and prevent others from happening by using this software:

  • Step 1 : Download and install Computer Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista - Microsoft Certified).
  • Step 2 : Click on “Begin Scan” to uncover Pc registry problems that may be causing Pc difficulties.
  • Step 3 : Click “Repair All” to fix all errors.

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Download a free PST Management Suite trial to learn how to delete large PST files.


Name Enter Valid data area Standard
MaxFileSize REG_DWORD 0 - 00000001 - 0 - 0000C800 0 - 7BB04400 2,075,149,312 (1,933 GB)
WarnFileSize REG_DWORD 0 - 00042400 - 0 - 7C004400 0–74404400 1 950 368 768 (1 816 GB)
MaxLargeFileSize REG_DWORD 0 - 00000001 - 0 - 0000C800 0 - 0000C800 51 200 (50GB)
WarnLargeFileSize REG_DWORD 0 - 00000000 - 0 - 0000 BE00 0 - 0000BE00 48.640 (47.5 GB)
Name Enter Valid data area Standard
MaxFileSize REG_DWORD 0 - 00000001 - 0 - 0000C800 0 - 7BB04400 2,075,149,312 (1,933 GB)
WarnFileSize REG_DWORD 0 - 00042400 - 0 - 7C004400 0–74404400 1 950 368768 (1 816 GB)
MaxLargeFileSize REG_DWORD 0 - 00000001 - 0 - 0000C800 0 - 00005000 20 480 (20GB)
WarnLargeFileSize REG_DWORD 0 - 00000000 - 0 - 0000 BE00 0 - 00004C00 19 456 (19 GB)

How To Fix Outlook PST Corruption Due To Large File Size?

As you read, setting limits on the size of Outlook files through registries is not a big deal. However, this still requires a certain level of attention and a little technical knowledge. Setting values ​​well beyond the limits you set can corrupt your PST files. For those users who have suffered PST corruption after using this method or who have already encountered PST problem, we recommend that you trust Kernel for Outlook PST Repair Tool. This tool has all the features you need for a quality PST repair. The main thing is a simple user interface and smart filters. Get a live trial with a demo on the site.

  • Free Download 100% SECURITY
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What is the maximum size of Outlook PST file?

By default, the size of a Unicode PST or Oriental file can be up to 20 GB in Outlook 2007 and up to 50 GB in Outlook 2010, 2013, 2016, 2019 and Office 365. However, the technical limit is 4194304 GB (4096 TB or 4 PB), and the standard limit can be changed. The 2GB limit applies to ANSI pst and ost files.


How do I increase my outlook memory size?

Increase file size

Click "Change". The number entered here reflects your new maximum mailbox size and must be entered in bytes. As a starting point, 2,075,149,312 bytes is the default 1.933 GB limit in Outlook 2010. Enter a new maximum size in the Value field.


 

 

 

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