You receive an email that says: “A document has been shared with you on SharePoint. Click below to view the file.” 

The email includes a familiar company name, a document title, and a button labeled Open. 

It looks like a normal Microsoft 365 notification. Maybe it is a contract from a supplier, a financial report from your manager, or a project document from a colleague. 

But what if the invitation is fake? 

Cybercriminals often imitate SharePoint file-sharing notifications to trick employees into opening malicious links, entering passwords, or sharing confidential information. 

Some attacks are even more convincing because they use real SharePoint links or compromised Microsoft 365 accounts. 

So how can you tell whether a SharePoint invitation is legitimate? 

The safest rule is simple: Don't trust a file invitation just because it looks like Microsoft. Verify the sender, the file, and the request before opening it. 

Quick Answer: How Can You Tell If a SharePoint Invitation Is Real? 

If you receive an unexpected SharePoint file invitation: 

1. Don't click the link immediately. 

2. Check who shared the file and whether you recognize them. 

3. Ask yourself whether you were expecting the document. 

4. Examine the link destination without opening it. 

5. Open SharePoint or Microsoft 365 through your usual trusted method. 

6. Look for the shared file in your account, if it is available there. 

7. If necessary, contact the sender through a separate, trusted communication channel. 

8. Never enter your password into an unexpected login page without verifying the website. 

Remember: 

A familiar Microsoft logo or legitimate-looking SharePoint link does not automatically mean the invitation is safe. 

What Is a SharePoint File Invitation? 

A SharePoint file invitation is a notification that someone has shared a document, folder, or other file with you using Microsoft SharePoint. 

SharePoint is part of the Microsoft 365 ecosystem and is commonly used by businesses to store, organize, and share files. 

For example, an employee might receive an invitation to access: 

• A contract from a supplier 

• A shared project folder 

• A financial spreadsheet 

• An HR document 

• A customer proposal 

• A company presentation 

Legitimate SharePoint invitations can be sent to employees, customers, suppliers, or external partners. 

Because these notifications are so common in business, attackers know that employees may open them without thinking twice. 

What Does a Fake SharePoint Invitation Look Like? 

A fake invitation may look almost identical to a genuine Microsoft notification. 

For example: 

Subject: A file has been shared with you 

Sarah from Finance has shared a document with you. 

Document: Q4 Financial Report.xlsx 

Open Shared File 

The message may include Microsoft's logo, familiar colors, and a professional layout. 

But clicking the button could lead to a fake Microsoft 365 login page. 

The attacker hopes you will enter your business email and password. 

In other cases, the link may open a real SharePoint-hosted file containing malicious instructions or a link to another website. 

This is why identifying SharePoint phishing requires more than checking whether the email looks professional. 

Why Do Attackers Use SharePoint Invitations? 

SharePoint invitations are attractive to attackers for several reasons. 

1. Employees Are Used to Receiving Shared Files 

Many employees receive file-sharing notifications every day. 

Opening a document from a colleague or supplier feels like a normal part of work. 

Attackers take advantage of this habit. 

2. Microsoft Is a Trusted Brand 

A notification that appears to come from Microsoft may feel more trustworthy than an unfamiliar email. 

Attackers exploit that familiarity by copying Microsoft branding. 

3. The Invitation Creates Curiosity 

A document title such as: “Updated Salary Information” or “Confidential Contract for Review” can encourage employees to open the file quickly. 

4. Attackers Can Use Real Microsoft Services 

Not every phishing attempt uses an obviously fake website. 

Attackers may abuse legitimate cloud-sharing services or compromised accounts to distribute malicious content. 

As a result, a real SharePoint link is not always proof that the document itself is safe. 

7 Signs a SharePoint File Invitation May Be Fake 

1. You Weren't Expecting the File 

You receive a document from someone you don't recognize. 

Or a familiar colleague suddenly shares an unusual file without explanation. 

For example: 

“Confidential Payroll Changes.xlsx” 

If the document is unexpected, verify it before opening. 

An unexpected file is not automatically malicious, but it deserves closer attention. 

2. The Email Creates Urgency 

Be careful with messages such as: 

“Review this document within 30 minutes.” 

“Your access will expire today.” 

“Immediate approval required.” 

Some legitimate sharing links have expiration dates, but attackers frequently use urgency to pressure recipients into clicking. 

3. The Sender's Address Looks Suspicious 

The display name may say: 

Microsoft SharePoint 

but the actual email address may belong to an unrelated domain. 

Check the full sender address rather than trusting the display name. 

However, remember that a legitimate account can also be compromised. 

A familiar sender is helpful evidence, not a guarantee of safety. 

4. The Link Leads to an Unfamiliar Website 

A fake invitation may direct you to a website designed to imitate Microsoft's sign-in page. 

For example, the link may use a lookalike domain such as: sharepoint-login.example.com 

This is an illustrative address, not a Microsoft service. 

Be cautious of unexpected redirects and unfamiliar domains. 

5. The File Asks You to Log In Again Unexpectedly 

You open a shared document and suddenly see a Microsoft 365 login screen. 

This does not automatically mean phishing. Legitimate sharing can require authentication. 

But you should verify that the sign-in page is genuinely Microsoft's before entering credentials. 

If something feels unusual, close the page and access Microsoft 365 directly. 

6. The Document Asks You to Follow Another Link 

Sometimes the SharePoint link itself is legitimate. 

But the document contains a message such as: 

“This document has moved. Click here to view the updated version.” 

The new link may lead to a phishing website. 

This technique uses a trusted file-sharing platform as the first step of the attack. 

7. The File Requests Sensitive Information 

Be cautious if the shared document unexpectedly asks you to provide: 

• Microsoft 365 passwords 

• MFA verification codes 

• Customer information 

• Financial records 

• Employee data 

• Payment information 

A shared document should not automatically be trusted simply because it is hosted on SharePoint. 

Real vs. Fake SharePoint Invitation: What Should You Check? 

Important: None of these checks alone proves a file is safe. Look at the full context. 

How to Verify a SharePoint Invitation Without Clicking the Email 

You do not need to immediately follow the invitation link to determine whether the request is legitimate. 

Step 1: Check Whether You Expected the Document 

Ask yourself: 

Was I expecting someone to share this file? 

Does the document title make sense? 

Is this related to a current project or conversation? 

If the answer is no, investigate further. 

Step 2: Check the Sender 

Look at the full sender address. 

If the message claims to come from a colleague or supplier, compare it with contact information you already trust. 

Do not rely only on the display name. 

Step 3: Inspect the Link 

On a desktop, you can usually hover over a link to preview its destination without opening it. 

On mobile, use the available link-preview feature cautiously, without selecting an option that opens the destination. 

Look for unexpected domains or redirects. 

However, a legitimate Microsoft-hosted link can still lead to malicious content, so this is not a complete safety check. 

Step 4: Open Microsoft 365 Directly 

Instead of using the email link, open your normal Microsoft 365 or SharePoint application. 

You can also access the service through a trusted bookmark or your company's approved portal. 

Check whether the file appears in your shared files or recent activity. 

Keep in mind that some external sharing invitations may not appear in your normal file list until accepted. 

Not finding the file does not automatically prove the invitation is fake. 

Step 5: Verify With the Sender 

If you're unsure, contact the person who supposedly shared the file. 

Use an existing Teams conversation, a known phone number, or another previously trusted channel. 

Ask: 

“Did you just share a SharePoint document called Q4 Financial Report with me?” 

If they confirm, you can continue using your organization's approved file-sharing process. 

If they deny sending it, report the invitation. 

Can a Phishing Invitation Use a Real SharePoint Link? 

Yes. 

This is one of the most important things employees should understand. 

A phishing attempt does not always start with a fake domain. 

An attacker may use a legitimate Microsoft 365 environment to host a document. 

The shared file might contain: 

• A link to a fake login page 

• Instructions to provide sensitive information 

• A QR code leading to a phishing website 

• A malicious download 

• A request to contact a fraudulent email address 

The first link may genuinely belong to SharePoint, while the dangerous action happens later. 

This is why: 

A real SharePoint link does not automatically mean the content is safe. 

Can a SharePoint Invitation Come From a Compromised Account? 

Yes. 

Suppose a supplier's Microsoft 365 account has been compromised. 

The attacker may use the supplier's legitimate account to send file invitations to customers and business partners. 

The notification may contain: 

• The supplier's real name 

• Their legitimate email address 

• A real Microsoft-hosted sharing link 

• A familiar document title 

Everything may appear normal. 

But the attacker controls the shared content or the account sending it. 

In this situation, checking the email address alone may not reveal the attack. 

The safer approach is to verify unusual sharing requests independently. 

What Should I Do If I Already Clicked a Fake SharePoint Invitation? 

The appropriate response depends on what happened after you clicked. 

If You Only Opened the Link 

Close the suspicious page. 

Do not enter information or download files. 

Report the incident to your IT or security team, especially if you used a business device or account. 

If You Entered Your Microsoft 365 Password 

Treat the password as potentially exposed. 

Access Microsoft 365 through the legitimate service and change the password immediately. 

Notify IT/security so they can check for unauthorized access and take appropriate steps to secure the account. 

If You Entered an MFA Code or Approved a Login 

Report the incident immediately. 

Attackers may attempt to use stolen verification codes or authentication approvals to access your account. 

If You Downloaded or Opened a Suspicious File 

Stop interacting with the file and contact IT/security. 

Explain what you downloaded, whether you opened it, and whether you installed or enabled anything. 

Follow your organization's instructions for checking or isolating the device. 

If You Shared Confidential Information 

Report exactly what information was sent or entered. 

This may include customer records, financial information, employee data, or internal documents. 

The security team can then assess the potential exposure. 

Why SharePoint Phishing Is Dangerous for Businesses 

A successful SharePoint phishing attack can lead to more than a stolen password. 

Depending on the access obtained, attackers may be able to: 

• Read business emails 

• Access shared company documents 

• Download confidential information 

• Impersonate employees 

• Send malicious invitations to colleagues 

• Target suppliers or customers 

• Attempt payment fraud 

• Compromise additional business accounts 

A single convincing file invitation can become the starting point of a larger business email compromise or data theft incident. 

How Can Businesses Reduce SharePoint Phishing Risks? 

Employee awareness is important, but businesses should also have technical and operational protections. 

1. Protect Microsoft 365 Accounts 

Use strong authentication, appropriate access controls, and monitoring for suspicious sign-ins and account changes. 

2. Monitor Suspicious Sharing Activity 

Review unusual external sharing, unexpected file permissions, and other suspicious document-sharing activity where monitoring is available. 

3. Protect Business Email 

Email security can help detect suspicious senders, impersonation, phishing links, and potentially compromised accounts. 

4. Restrict Unnecessary External Sharing 

Set appropriate sharing permissions based on business needs. 

Not every file should be available to anyone with a link. 

5. Train Employees to Verify Unexpected Invitations 

Employees should learn to ask: 

“Was I expecting this file?” 

“Do I know who shared it?” 

“Can I verify the request independently?” 

6. Make Reporting Easy 

Employees should know how to report a suspicious SharePoint invitation without needing to investigate it themselves. 

A quick report may help protect other employees who received the same invitation. 

A 30-Second SharePoint Invitation Checklist 

Before opening a shared document, ask: 

Expected? Was I waiting for this file? 

Sender? Do I recognize and trust the person? 

Purpose? Does the document make sense for my work? 

Link? Does it lead somewhere unexpected? 

Login? Is it asking for credentials on an unfamiliar page? 

Content? Does the document ask me to open another link or provide sensitive information? 

Verification? Can I confirm the invitation through a trusted channel? 

When in doubt: 

Don't click → Verify the sender → Open through a trusted service → Report if suspicious. 

Key Takeaways 

A SharePoint file invitation can be legitimate. 

But attackers can also imitate Microsoft notifications, compromise real accounts, or abuse legitimate SharePoint links to deliver phishing content. 

That means employees should not rely only on logos, sender names, or familiar-looking URLs. 

The safest approach is simple: 

Verify the file-sharing request, not just the invitation email. 

Before opening an unexpected document, confirm who shared it, why it was shared, and whether the request makes sense. 

Frequently Asked Questions 

Are SharePoint file invitation emails legitimate? 

Yes. Microsoft SharePoint supports legitimate file-sharing notifications. However, attackers can imitate these messages or abuse real sharing services, so unexpected invitations should be verified. 

How can I tell if a SharePoint invitation is fake? 

Check whether you expected the file, recognize the sender, trust the link destination, and can confirm the request independently. Be especially cautious of unexpected login pages or requests for sensitive information. 

Can a fake SharePoint invitation use a real Microsoft link? 

Yes. Attackers may use legitimate SharePoint-hosted documents containing malicious links or instructions. A genuine Microsoft-hosted URL does not guarantee that the content is safe. 

Should I enter my Microsoft 365 password to open a shared file? 

Some legitimate SharePoint sharing methods require authentication. However, always verify that you are signing in through a genuine Microsoft or approved company authentication page before entering your password. 

What should I do if I clicked a fake SharePoint link? 

Stop interacting with the page and report the incident. If you entered credentials, approved an MFA request, or downloaded a suspicious file, notify IT/security immediately and follow the appropriate response steps. 

Can SharePoint phishing come from a colleague's real account? 

Yes. If a colleague's Microsoft 365 account is compromised, an attacker may send malicious sharing invitations from that legitimate account.