---
title: "Outlook Tenant error (550 5.7.708 Access denied)"
description: "Resolve Outlook Tenant error (550 5.7.708 Access denied) with our troubleshooting guide."
url: https://helpcenter.smartlead.ai/en/articles/81-outlook-tenant-error-550-57708-access-denied
collection: "Email Disconnection Errors"
updated: 2026-11-04
language: en
---

# Outlook Tenant error (550 5.7.708 Access denied)

Resolve Outlook Tenant error (550 5.7.708 Access denied) with our troubleshooting guide.

**What Does This Error Mean?**

This error means Microsoft has blocked outgoing email traffic from your account because the IP address it is sending from has a low reputation. According to Microsoft, this most commonly affects new customers and trial subscriptions on Microsoft 365. [Microsoft](https://learn.microsoft.com/en-us/topic/ndr-error-codes-550-5-7-703-550-5-7-705-550-5-7-708-and-550-5-7-750-f5675801-1846-4d1c-9599-5b4e26a9175d)

**Important: This Requires Admin Access**

This error cannot be resolved by a regular user. Only an **email admin** in your organisation can fix it. If you are not the admin, forward this article to whoever manages your Microsoft 365 account.

**How to Fix It**

**If you are on a Microsoft 365 trial subscription:**

Contact Microsoft Support and request an IP address exception. Microsoft will grant temporary access until you assign proper Exchange Online licenses to the account.

To contact Microsoft Support as an admin:

1.  Log in to the **Microsoft 365 Admin Center** at [admin.microsoft.com](https://admin.microsoft.com)
    
2.  Go to **Support > New service request**
    
3.  Explain that you are receiving error 550 5.7.708 on a trial subscription and request an IP exception
    

**If you are on a paid Microsoft 365 subscription:**

A paid subscription receiving this error may indicate a reputation issue with your sending IP. Contact Microsoft Support via the Admin Center using the same steps above and reference error code 550 5.7.708.

**After the Error Is Resolved**

Once Microsoft has lifted the block, reconnect the affected mailbox in Smartlead:

1.  Go to **Email Accounts** in Smartlead
    
2.  Find the affected Outlook or Microsoft 365 mailbox
    
3.  Click **Reconnect** and complete any prompts
    

**Related Articles**

-   [Understanding Email Account Disconnection Reasons in Smartlead](https://helpcenter.smartlead.ai/en/articles/65-understanding-email-account-disconnection-reasons-in-smartlead.md)