How to Increase the Outlook Attachment Size Limit?

On several instances you might have noticed that while adding the file to the email, you get the message about increased size limit of the attachment. The attachment size increases because of addition of image, file or video which gets over 25 megabytes. If increased the file in Outlook then Outlook will not be increased. Users usually feel the need to fix the increase the file size limit. While changing the file attachment limit in MS Outlook then it will not allow to work. If you use Outlook and file size limit is high then attachments won’t move away.

How to Increase the Outlook Attachment Size Limit? Here are the steps:

  1. Open Microsoft® Outlook desktop client.

outlook attachment size open

  1. Then click Windows key + R for opening the Windows run dialog box as shown in the screenshot below:

outlook attachment size

  1. Once Windows Run dialog box opens, type “regedit” and press OK.

rededit

  1. After this, choose ‘Yes’ on the pop-up which asks that it is fine if certain alterations are made to the device asks. See the screenshot below:

 

registry editor

  1. After this, navigate to the mentioned below keys in the registry tree (all depends on the Office edition you are using).

Outlook 2010: HKEY_CURRENT_USER\­Software\­Microsoft\­Office\­14.0\­Outlook\­Preferences.

Outlook 2013: HKEY_CURRENT_USER\­Software\­Microsoft\­Office\­15.0\­Outlook\­Preferences.

Outlook 2016: HKEY_CURRENT_USER\­Software\­Microsoft\­Office\­16.0\­Outlook\­Preferences.

browse

  1. till this is done; open the ‘MaximumAttachmentSize’ value in the right pane (if it exists there). Press Edit >> New >> DWORD (32-bit) Value and then rename the value to ‘MaximumAttachMentSize’ as given in the screenshot below:

outlook registry editor

  1. Now, add the size limit. Make sure for adding in KB. If you enter zero for value data, then MS Outlook will not set the any limit on images. Check out the below given screenshot:

edit dword

 

  1. Lastly close the process by pressing OK and close the Registry Editor. See the screenshot below:

edit dword hexadecimal

 

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