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Firewall blocking Microsoft Office 365 apps - Can't use Sharepoint or update apps and licenses



I have just installed Total Protection, and so far not really happy. 

Firewall is jamming up every tentative connection. 

Browsers slowed down significantly and only work sometimes. Often a page returns a 'no internet' error, but after a few reloads it loads properly.

Microsoft Office 365 apps cannot communicate with the web - can't save files on OneDrive and SharePoint, and cannot download MS O265 software and license updates. 

The firewall has no hint as to which apps were blocked/granted access or a list of recent apps that tried to connect for me to just select the app and say "allow" - it's just not friendly ,and MSOffice apps should be known by the app already due to their popularity.

Turn off the firewall and voila - problems gone. But then again, why have a firewall? 

1 Reply

Re: Firewall blocking Microsoft Office 365 apps - Can't use Sharepoint or update apps and licenses


Try the below steps and update us the status.

  1. Open your McAfee software.
  2. Click Web and Email Protection, or click the gear icon in the top-right corner.
  3. Select Firewall.
  4. Click the Ports and System Services drawer.
  5. Enable the Port 80 - Web Server(HTTP), Port 443 - Secure Web Server(HTTPS), Port 1433 (
  6. Click Add.
  7. Type the following details in the corresponding fields:
    • System Service: Sharepoint
    • System Service category: Online storage
    • Service Description: Sharepoint
    • Local TCP Ports: 2382-2383, 32846
    • Local UDP Ports: 1434
  8. In the Open Ports drop-down list, select All PCs.
  9. Click Save and restart your computer.



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