Be it a resume, an image, or another important report, knowing how to attach a file in Microsoft Outlook is a useful skill. In fact, Outlook makes sharing files simple, whether you prefer the desktop app, web version, or mobile app. Here’s a comprehensive guide that will help you attach files with confidence.

Why Attachments Are Important in Outlook?

Outlook is a common email client with many millions of users for both personal and business purposes. The ability to attach and send files is a primary component of virtually all emailing—whether you are submitting a job application, collaborating with a team, or needing to send documents securely.

How to Attach a File in Outlook (Desktop App)

If you’re using the Microsoft Outlook application on Windows or macOS, here’s how to do it:

Step 1: Open Outlook and Click “New Email”

• Launch Outlook and click “New Email” from the Home tab to start composing a message.

Step 2: Click the “Attach File” Icon

• In the new message window, go to the Insert tab or simply click the paperclip icon.
• You’ll see recent files listed for quick access.
• Click “Browse This PC” to attach files from your computer.

Step 3: Choose Your File

• Navigate to the file location, select the file, and click Open.
• The file will appear below the subject line.

Step 4: Send Your Email

• Add your recipient’s email, subject, and message.
• Click “Send.”

Tip: You can attach multiple files by holding down the Ctrl key (Cmd on Mac) while selecting files.

How to Attach a File in Outlook Web (Outlook.com)

Using the web version? Here is how to add files:

Step 1: Go to Outlook.com and Sign In

Click on “New Message” in the top left corner.

Step 2: Click the Paperclip Icon

• It is in the bottom of the compose window.
• You can select Browse this computer or Browse cloud locations to attach from OneDrive.

Step 3: Select and then Attach Your File

• Select the file then click Open.
• The file will upload, and you will also see it in the email draft.

How to Add a File in Outlook Mobile App (iOS/Android)

Step 1: Open the Outlook App and Create New Message

Click the “+” (plus) icon or new message button.

Step 2: Tap the Paperclip Icon

You can find it at the top of the keyboard or message window.

Step 3: Choose File Source

• You may choose from, Browse, Files, Photos, or OneDrive.
• Select the file and tap Attach.

Step 4: Send Away!

Type you message and tap Send.

Quick Tips for Email Attachments on Outlook

• Be sure to check file size. Outlook has a size limit of 20-25MB per attachment.
• For larger files, make sure to try using OneDrive if available. As it will automatically create a cloud link.
• Avoid special characters ( such as & , %, $) in file names to help avoid errors.
• Double-check your attachments before sending, especially if sensitive.

Common Issues and Fixes

Issue	Fix
File won’t attach	Check file size or internet connection
Recipient can’t open file	Send in a common format like PDF or DOCX
Attachment blocked	Avoid executable files (.exe) or use a zipped folder

Conclusion

Attaching a file in Outlook is an easy yet essential component of everyday communication. This guide showed you how to use the feature on desktop, in browser, or mobile, and mastering this will make your emails more succinct, more professional, and more informative.

Now just hit that paperclip! You just enhanced your productivity levels.

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