1. Outlook For Mac 2016 Attachment Size Limits
2. Outlook For Mac 2016 Attachment Size Limit Size
3. Outlook For Mac 2016 Attachment Size Limit Office 365

If your mailbox exceeds one or more size limits set by the administrator, emails cannot be sent or received. In this case, you have to increase Outlook mailbox size limit or erase the mailbox. To ease Outlook mailbox, you can see how to delete emails in Outlook. In this article, we aim to show you how to view and increase Outlook mailbox size limit.

Hello, How do I update the attachment limit for Mac email clients that are using ews? I look in the web config file and it’s shows maxrequestlength= 2097151, which is 200MB. For me this happens when Outlook for Mac 2016 tries to download attachments using a weak internet connection. Somehow, the download fails, and Outlook is unable to re-download later when a better connection is available. So the greyed out attachments are just stuck in limbo - can't open, can't redownload.

View Mailbox Size Limit in Outlook 2007/2010/2013/2016

Step 1: Open Mailbox Cleanup window.

In Outlook 2007: Click on Tools from the Menu Bar and select Mailbox Cleanup in the drop-down.

In Outlook 2010/2013/2016: click on File, go to Mailbox Cleanup section and tap on the down arrow next to it.

Step 2: In the Mailbox Cleanup window, click on View Mailbox Size. When the Folder Size window popups, you can view mailbox size limit in Outlook.

Increase Mailbox Size Limit in Outlook 2007/2010/2013/2016

You can increase mailbox size limit in Outlook by change settings in Registry Editor.

Step 1: Press Windows + R key to invoke Run dialog box. Input regedit and Enter to open Registry Editor.

Step 2: In the left pane, expand My Computer. Navigate to the following directory.

For Outlook 2007: HKEY_CURRENT_USERSoftwarePoliciesMicrosoftOffice12.0OutlookPST

For Outlook 2010: HKEY_CURRENT_USERSoftwarePoliciesMicrosoftOffice14.0OutlookPST

For Outlook 2013: HKEY_CURRENT_USERSoftwarePoliciesMicrosoftOffice15.0OutlookPST

For Outlook 2016: HKEY_CURRENT_USERSoftwarePoliciesMicrosoftOffice16.0OutlookPST

Note: If you cannot find any folders above, right-click to create a new key and rename it.

Step 3: Find out four DWORD in the right filed as below:

• MaxFileSize

• WarnFileSize
• MaxLargeFileSize
• WarnLargeFileSize

Step 4: Right-click on each item above and select Modify.

Step 5: When the Edit DWORD (32-bit) Value window, input the value in the box under Value Data. Once you do not see any item on the list, go to the steps in the following.

Note: The conversion between units list here:

1GB=1*1024*1024*1024byte; 1MB=1*1024*1024byte; 1KB=1*1024byte.

Step 6: Right-click to create NewDWORD (32-bit) Value. Rename it as we have mentioned in Step 3. Repeat the Step 4 to Step 5. Close Registry Editor and launch your Outlook to check the changes affect or not.

Related Links:

How to change the attachment size limitation in Outlook?

Outlook For Mac 2016 Attachment Size Limits

Sometimes, I can’t insert a big attachment successfully in Outlook, but get a warning dialog box saying the attachment size exceeds the allowable limit. See following screen shots. This error happens due to exceeding the size limitation of attachments in Outlook. In this article, I will guide you to change the attachment size limitation in Microsoft Outlook.

Change attachment limited size with Registry Editor (6 steps)

To change the attachment size limitation in Microsoft Outlook, you have to modify the parameter of MaximumAttachmentSize in the Registry Editor. And you can do it with following steps.

Step 1: Press the Win + R to open the Run dialog box, enter the regedit in the Open box, and click the OK button.

Step 2: In the coming User Account Control dialog box, click the Yes button.

Step 3: Now the Registry Editor window opens. Open the Preferences folder with following paths:

Outlook 2016:HKEY_CURRENT_USERSoftwareMicrosoftOffice16.0OutlookPreferences
Outlook 2013:HKEY_CURRENT_USERSoftwareMicrosoftOffice15.0OutlookPreferences
Outlook 2010: HKEY_CURRENT_USERSoftwareMicrosoftOffice14.0OutlookPreferences
Outlook 2007: HKEY_CURRENT_USERSoftwareMicrosoftOffice12.0OutlookPreferences

Step 4: Click the Edit > New > DWORD (32-bit) Value, and name the new DWORD as MaximumAttachmentSize.

Step 5: Double click the new DWORD to open the Edit DWORD (32-bit) Value dialog box, check the Decimal option, enter the attachment size limitation in the Value data box, and click the OK button. See screen shot below:

For example, you want to change the attachment size limitation to 100MB, enter the 102400 in the Value data box.

Note: If you do not want to limit the attachment size in Outlook, just enter the 0 in the Value data box.

Step 6: Close the Registry Editor window, and restart Microsoft Outlook.

After changing the attachment size limitation in the Registry Editor window, attachments will be inserted successfully only if their sizes are less than attachment size limitation. See following screen shot:

Change attachemnt limited size with Kutools for Outlook

With above method to increase attachment size is a little complex, but if you have Kutools for Outlook -- a handy Outlook addin, you can change the attachment limited size as you need as quickly.

Free install Kutools for Outlook, and then do as below steps:

1.Enable Outlook and click Kutools > Options. See screenshot:

2. In the Options dialog, click Other tab, and enter the limited size you want to change to into the textbox besides Maximum Attachment Size section. For instance, here I change the attachment size to 10MB (10240KB). See screenshot:

3. Click OK, and a dialog pops out to remind you restart the Outlook programs for taking effect the change. See screenshot:

After Outlook restart, the attachments limited size has been changed.

Tip:

1. If you want to change the attachment size to be unlimited, enter 0 into the Maximum Attachment Size textbox.

2. If you want to set the attachment size to default size, enter 1 into the Maximum Attachment Size textbox.

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Outlook For Mac 2016 Attachment Size Limit Size

Outlook For Mac 2016 Attachment Size Limit Office 365