How to configure the size limit for both (.pst) and (.ost) files in Outlook

How to configure the size limit for both (.pst) and (.ost) files in Outlook

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\PST

1. Click Start, and then click
Run.

2. In the Open box, type
regedit, and then click OK.

3. In the left pane, expand My Computer, and then expand HKEY_CURRENT_USER.

4. Expand Software, and then expand
Policies.

5. Expand Microsoft, and then expand
Office.

6. Expand 11.0 for Outlook 2003, 12.0 for Outlook 2007, or 14.0 for Outlook 2010, 15.0 for Outlook 2013, or 16.0 for Outlook 2016, and then expand Outlook.

7. Click PST, and then right-click
MaxFileSize in the right pane.

8. Click Modify, and then type the value in the Value data box.

9. Click OK.

10. Right-click WarnFileSize, and repeat steps 8 through 9.

11. Right-click MaxLargeFileSize, and repeat steps 8 through 9.

12. Right-click WarnLargeFileSize, and repeat steps 8 through 9.

Note You may have to create the registry values if they do not exist. If the registry values do not exist, follow these steps to create them.

1. Click Start, click Run, type Regedit, and then click OK.

2. In the left pane, expand the following registry key:

For Outlook 2016
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook

For Outlook 2013
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\Outlook

For Outlook 2010
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\14.0\Outlook

For Outlook 2007
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook

For Outlook 2003
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\11.0\Outlook

3. Right click Outlook, point to New, and then click Key.

4. Type PST, and then press ENTER.

5. Right click PST, point to New, and then click DWORD value.

6. Type MaxFileSize, and then press ENTER twice.

7. In the Edit DWORD Value window, choose Decimal and type the value in the Value data box, and then click OK.
Note 1GB=1*1024*1024*1024byte; 1MB=1*1024*1024byte; 1KB=1*1024byte, the example below is for 1GB.

8. Repeat steps 3 through 7 to create another DWORD WarnFileSize.

9. Repeat steps 3 through 7 to create another DWORD MaxLargeFileSize.

10. Repeat steps 3 through 7 to create another DWORD WarnLargeFileSize, and then close the registry.

Note For mass deployment of these registry keys on end-user machines, the ORK tool can be used.