How to increase attachment size in outlook? Print

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Exit Outlook.

Start Registry Editor.

Locate and then select one of the following registry subkeys:

  • HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook\Preferences
  • HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\x.0\Outlook\Preferences

The x.0 placeholder represents your version of Office (16.0 = Office 2016, 15.0 = Office 2013).
Manually create the path in the registry if it does not currently exist.

Add the following registry data under this subkey:

Value type: DWORD
Value name: maximum attachment size
Value data: An integer that specifies the total maximum allowable attachment size. For example, specify 30720 (Decimal) to configure a 30-MB limit.
Specify a value of zero (0) if you want to configure no limit for attachments.
Specify a value that is less than 20 MB if you want to configure a limit that is less than the default 20 MB.

Exit Registry Editor

Start Outlook & enjoy.

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