Is Microsoft 365 Having 550 708 Low Problems? Here Is the Fix

If your workflow is blocked, confirm the account and app context, then follow the ordered fixes below.

Problem Description: 550 708 Low Reputation

Hello, In our new Microsoft 365 tenant, outbound emails via Microsoft Graph API (application permissions, client credentials flow) are blocked with error 550 5.7.708 Service unavailable. Access denied, traffic not accepted from this IP. Manual sending from Outlook Web works fine, internal emails work, but external (e.g., Gmail) are rejected. NDR example: Remote server returned '550 5.7.708 Service unavailable. Access denied, traffic not accepted from this IP. For more information please go to [http://go.microsoft.com/fwlink/?LinkId=526653]() AS(7230) [PN2PR01MB8781.INDPRD01.PROD.OUTLOOK.COM 2026-01-10T18:36:33.655Z 08DE4FBF6F996242]' Tenant ID: This is a known issue for new/trial tenants with low reputation outbound IPs. Microsoft docs say to contact support for IP address exception until Exchange licenses are assigned. Please help request IP exception / sending exclusion or escalate to engineer. Thank you!

Quick Answer for Microsoft 365 Won't Complete Task

Contact Microsoft Support to request an IP address exception or sending exclusion, as new or trial tenants frequently experience the 550 5.7.708 error due to low-reputation outbound IPs.

Likely Causes Behind Common Send Triggers

• The Microsoft account or license context may not match the purchase or device.

• Cached credentials, outdated builds, or damaged local components can trigger send & receive issues.

• A file-specific corruption or add-in conflict can mimic a broader application failure.

Recommended Solution: Fixing Send Step by Step

When to use this: Apply these steps when the symptoms match and you can access the relevant Microsoft account or administrator.

1. Submit this request through official support channels before assigning Exchange licenses.

2. To prevent future blocks, align your email sending infrastructure with industry best practices.

3. Publish accurate Sender Policy Framework records, configure a static sending IP address, and ensure proper DomainKeys Identified Mail and Domain-based Message Authentication, Reporting, and Conformance authentication.

4. Maintain consistent sending volumes and monitor deliverability metrics closely.

5. Implement these configuration changes immediately to establish sender reputation and resolve Graph API application permission delivery failures across your Microsoft 365 environment.

Alternative Solutions for Broader Send Workarounds

1. Retry the Microsoft-side steps after restarting the app and device.

2. Test the same action in a private browser session or a new blank file to isolate account vs file issues.

3. Capture exact error text and screenshots before contacting Microsoft Support or your administrator.

Working with WPS Office: Using WPS While Microsoft 365 Is Unavailable

WPS Office cannot replace Microsoft account, activation, or cloud fixes for this scenario. It remains one of the best free Microsoft Office-compatible alternatives for opening and editing local files.

1. Download and install WPS Office from the official website.

2. Open local Word, Excel, PowerPoint, or PDF files in the matching WPS app.

3. Save a working copy locally while Microsoft-side issues are resolved.

4. Return to Microsoft Office after the primary fix succeeds.

If you need a practical local workspace in the meantime, try WPS Office.

Prevention Tips for Avoiding Repeat Send

• Keep one primary Microsoft account for subscriptions and Office sign-in.

• Install updates for Office and Windows before retrying failed workflows.

• Back up important files before repair, reset, or reinstall actions.

• Document exact error messages before the next troubleshooting attempt.

FAQs About 550 Troubleshooting FAQ

Can WPS Office fix this send & receive issues issue directly? Only when the WPS steps match the formatting or file task. Account, activation, and cloud issues stay on the Microsoft side.

Should I reinstall Microsoft 365 before trying these steps? Not first. Confirm account, license, and the exact error before reinstalling.

What should I send to Microsoft Support? The affected account email, device type, Office version, exact error text, and screenshots with personal data hidden.