Fix: Outlook Unknown Error 0x800cce05

The error 0x800cce05 is associated with Outlook. This error states, ‘Task ‘Hotmail – Sending’ reported error (0x800cce05): ‘Unknown Error 0x800cce05.’ A majority of people have problems with sending and receiving emails using Outlook.

Specifically, this error doesn’t allow users to send emails. Although users can receive emails, they are unable to send them to others. This issue obstructs users, as it also occurs within Windows 10, which is the latest OS build from Microsoft. Reinstalling the connector and deleting the Outlook account doesn’t work in this case.

Outlook is one of the most widely used email handling software developed by Microsoft. It is a stand-alone package with a calendar, contact manager, task manager, and more, reducing the need to go back and forth between sending and viewing emails, managing meetings, and handling tasks to be performed. Therefore, it is essential to fix errors for users who rely on it.


Reason behind the error 0x800CCE05:

This error can be caused by corrupted system files that create conflicts with some software programs like Outlook. Internet security software installed on the PC can also be the culprit behind this error.

Solutions to Fix Error 0x800cce05

A number of solutions can be performed to get rid of this annoying error message. Follow the methods below to accomplish this.

Method #1: Running a System File Checker Scan (SFC Scan).

The most authentic solution to restore email sending functionality in your Outlook is to run a System File Checker Scan to allow it to find and fix the issue. Follow the steps below to run an SFC Scan on your computer.

1. Open the Command Prompt (Admin) by pressing the Win + X keys on the keyboard and selecting Command Prompt (Admin) from the list.


2. Inside the Command Prompt, type ‘sfc /scannow‘ and hit the Enter key to execute the command. It will start scanning and verifying the system for corrupted files, and it will also fix them automatically. Please be patient, as it might take up to 15 minutes to find and fix the problem. After the process is complete, test your Outlook by sending an email.


Method #2: Fixing Internet Security Software

Internet security software can also cause this issue by blocking calendar and other services of Outlook. As a result, Outlook’s operations are disturbed. In this case, you should allow the calendar or other Outlook services blocked by internet security software in order to fix the sending email issue. If you don’t know how to allow them, then resetting or uninstalling and reinstalling could reset the rules. If it works after uninstalling, then you can install a different antivirus, such as AVG Free.

The most common antivirus known to cause this is Avast!”.


Kamil Anwar

Kamil is a certified MCITP, CCNA (W), CCNA (S) and a former British Computer Society Member with over 9 years of experience Configuring, Deploying and Managing Switches, Firewalls and Domain Controllers also an old-school still active on FreeNode.