Working with attachments in Outlook on the web for business

You can use attachments to add one or more files to any email or calendar item you create. And you can insert (embed) a picture into the body of a message.

In this article

Attach a file to a message

Attach a file to a calendar event

Insert a picture in a message

Attach a message to another message

Remove an attachment

View an attachment

More information about attachments

Attach a file to a message

  1. Create a new message, and on the menu bar, choose Attachinsert.

    Attach a file to a message.

  2. Browse to find the file you want to attach, and, if necessary, choose Open to add it to your message.

  3. Do one of the following:

    • Choose Upload and attach as a OneDrive file.

    • Choose Attach as a copy.

  4. Choose Send.

Tip:  You can select multiple files from the same folder. To select multiple files that don’t appear next to each other, hold down the Ctrl key and select the files that you want. To select files that are next to each other, hold down the Shift key, select the first file and then the last file that you want, and release then release the Shift key.

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Attach a file to a calendar event

  1. Create a new calendar event or edit an existing event.

  2. To create a new calendar event, choose the down arrow New button and down arrow , and then choose Calendar event.

  3. Add or edit details for the event.

  4. On the menu bar, choose Attach insert , and then browse to find the file you want to attach, and, if necessary, choose Open to add it to your event.

  5. Do one of the following:

    • Choose Upload and attach as a OneDrive file.

    • Choose Attach as a copy.

  6. Choose Save.

Insert a picture in a message

You can insert (embed) a picture in your email message or in a message that's part of a calendar event.

  1. To add a picture to an email or a calendar event message, choose Insert picture inline Insert picture on the format menu bar.

    Insert a picture from the Format menu bar

  2. Browse to find the picture you want to insert, select it, and then choose Open.

  3. After you’ve added pictures, you can resize them by selecting them and choosing a new size: Small, Best fit, Original.

Tip:  You can select multiple files from the same folder. To select multiple files that don’t appear next to each other, hold down the Ctrl key and select the files that you want. To select files that are next to each other, hold down the Shift key and select the first file and then the last file that you want, and then release the Shift key.

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Attach a message to another message

You can drag a message to another message.

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

  2. In the upper-right corner of the menu bar, choose New window Open a new window , to edit the message in a separate window.

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

  4. Select the message in your list view that you want to attach and drag the message to your new message.

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Remove an attachment

To remove a file you've attached to a message, choose discard next to the attachment name.

To remove a picture you inserted in a message, select the picture, and then choose Remove.

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View an attachment

Depending on the device you're using, there are multiple ways to open an attachment to view it. Many of the options described next might require you to save the attachment before you can view it.

  • Right-click an attachment, and then choose View, Download, or Upload to OneDrive - Microsoft.

    Note: The availability of the View option is dependent on the type of file attachment.

  • Choose one of two available options listed below the attachment: Download or Upload to OneDrive - Microsoft.

  • Hover over an attachment to select it, or double-click it. In each case, you can choose to Open, Save, Save as, or Save and open the attachment.

  • Tap or click insert on a touch device to download or open the attachment. There might be an additional message that asks if you want to save the attachment to your device. The options you see will depend on the type of device you’re using and what type of file you’re downloading or opening. If you save the attachment to your device, note where you saved it and open it from there.

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More information about attachments

  • An attachment can be a file that’s created in any program—for example, a Word document, an Excel spreadsheet, a .wav file, or a bitmap file.

  • Some attachments may be removed or blocked by antivirus software used by your organization or by the organization of the recipients of your email. If you have a question about support for attachments, contact your help desk.

  • 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. We recommend that you use the Preview option if it's available.

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

  • Depending on the service that’s hosting your mailbox, the default size limit is 25 MB or 35 MB in Outlook for an entire message, including all attachments. Attachment and message size limits for your mailbox are set by your organization and may be different from the default limits.

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