Attach files in Outlook.com

You can attach files from your computer, OneDrive, or other storage account to email messages and calendar events and share them with others. You can also embed pictures in your email messages and calendar events.

Attach files from your computer

When you attach a file from your computer, you're attaching a copy of the file. Each recipient will get their own copy of the file.

Note: The attachment size limit for local files is 34 MB.

  1. In a message or calendar event, select Attach at the top of the page.

    A screenshot of the Attach button.

  2. Select Computer, choose the file you want to attach, and select Open.

    Tip: Double-click folders to open them.

  3. Select Attach as a copy.

Share files from OneDrive

You can also upload a file, and then share it as a OneDrive file. This way, your recipients can collaborate on it in real time.

Note: The attachment size limit for OneDrive files is 2GB.

  1. In a message or calendar event, select Attach at the top of the page.

    A screenshot of the Attach button.

  2. Select OneDrive - personal or OneDrive - <your business name>.

  3. Choose the file you want to attach and select Next.

    Tip: Double-click folders to open them.

  4. Select Share as a OneDrive link.

    To change if people can edit the file or only view it, select The More actions button. > Change permissions.

    A screenshot of the More actions button.

Attach files from another cloud storage account

You can also attach a file from Dropbox or Box. Anyone you share the file with can see the latest changes. See Use a storage account with Outlook.com for more information.

  1. In a message or calendar event, select Attach at the top of the page.

    A screenshot of the Attach button.

  2. Select Dropbox or Box.

  3. Choose the file you want to attach and select Next.

    Tip: Double-click folders to open them.

  4. Select Attach as a Dropbox file or Attach as a Box file.

Attach a message to another message

  1. Open a new message, or reply to or forward an existing message.

  2. Open the message in a new window by selecting The Edit in a separate window icon at the top right corner.

    Note: If you don't see The Edit in a separate window icon , first try expanding the message by selecting The Expand icon at the top right corner.

  3. Arrange the windows so you can see both the message list and your new message.

  4. Select and drag the message you want to attach from the message list to your new message.

    A screenshot of a message being dragged into the Compose pane

Attach a folder

You can't attach a copy of a folder in Outlook.com. However, you can attach a link to the folder when the folder is in OneDrive.

  1. Go to OneDrive.com, and sign in using the same email address and password you use for your Outlook.com account.

  2. Open File Explorer The File Explorer icon and navigate to the folder you want to attach.

  3. Drag the folder into OneDrive.com.

    A screenshot of a cursor dragging a folder into OneDrive.com

  4. Go to Outlook.com, and create a new message or open a message from the message list.

  5. Select Attach, choose the folder in OneDrive you want to attach, and then select Next.

  6. Select Next > Share as a OneDrive link.

By default, recipients will be able to edit the files in the folder. To change permissions so that recipients can only view the files:

  1. Select More actions > Change permissions.

    A screenshot of the More actions menu

  2. Select Anyone can view, and then select OK.

Print an attachment

  1. Open the message containing the attachment you want to print.

  2. Select the attachment, and then select Download.

    Caution: Don't open an attachment sent in an email message unless you trust the content and the person who sent it to you. Attachments are a common method for spreading computer viruses. In the email message, select Preview from the drop-down menu next to the attachment to view the contents of the attachment without opening it.

  3. Open the attachment using its corresponding app or program, and then print. For example, open a .docx file in Word and then print.

Remove an attachment

In the email message you're writing, select The Delete button. at the top right corner of the attached file to delete it.

A screenshot of the Delete attachment button.

Insert a picture in an email message or calendar event

  1. Open the message or calendar event.

  2. Select the picture icon to insert a picture from OneDrive or your computer.

    The Insert Picture icon lets you insert from OneDrive or your computer

  3. Choose the picture you want to insert and select Open (if you chose a picture from your computer) or Insert (if you chose a picture from OneDrive).

  4. Drag the corner handles to make the image bigger or smaller.

    Drag the image handles to make the image bigger or smaller

  5. Right-click the image to see formatting options.

Tips for sending and receiving file attachments

  • If you reply to a message that has an attachment, the attachment won’t be included in the reply.

  • Don't open an attachment sent in an email message unless you trust the content and the person who sent it to you. Attachments are a common method for spreading computer viruses. In the email message, select Preview from the drop-down menu next to the attachment to view the contents of the attachment without opening it.

  • Long file names of attachments might be shortened in Outlook.com. This won’t affect the contents of the file.

  • You can only attach files to calendar events that you or a delegate created.

Error when you open a picture or other attachment

You might receive an error that says "We couldn't open the image file" or "access denied" when you try to open a picture or other attachment. This error could occur if you have a non-Microsoft email address as the primary email address on your account.

To resolve this issue, set your Microsoft email address as the primary email address:

  1. Sign in to the Microsoft account website.

  2. Select Your info.

  3. Select Manage your sign-in email or phone number.

  4. Select Make primary next to the alias you want as your primary. The alias has to be a Microsoft email address, such as an email account that ends with @outlook.com or @hotmail.com or @live.com.

To learn more about managing your aliases, go to Manage aliases on your Microsoft account.

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