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Microsoft Outlook is an important part of the Office suite that helps us send and receive emails. This application can also be used to manage email and other communication. Some users have been reporting an error 0x8004210A with Outlook in Office 365 Business.
The operation timed out while waiting for a response from the receiving server
This typically occurs when Microsoft Outlook fails to connect to your email server. Try disabling your antivirus software temporarily to see if it works. In this article, we will explain the possible solutions that you can try to fix this issue.
Related Article: Blocked Senders entries are missing in Outlook Web App
Outlook error 0x8004210A on Windows 10
This guide shows you how to fix the Outlook error 0x8004210A on Windows 10. Follow the below suggestions:
- Make sure that you are connected to the Internet
- Create a new Windows User Profile
- Clear the password caches
- Repair corrupted PST file.
Before you begin, restart your PC and your router and see if that works.
Make sure that you are connected to the Internet
This error is commonly caused by having a slow and sluggish internet connection. Therefore, before applying the other solutions, check if your connection speed is good and working correctly. If possible, change your ISP Internet Connection and check if that fixes the problems.
Create a new Windows user profile
Create a new Windows user profile and check if this will make any difference.
Clear the password caches
If you’re having trouble connecting to your Outlook account, one thing you can try is clearing your Microsoft credentials.
Open the Control Panel by clicking the Start button and selecting Control Panel. Once the Control Panel is open, change the view to large icons.
On the following screen, scroll down and select the User Accounts option.
From the left pane, select the Manage your credentials link.
In Credential Manager, select Windows Credentials. This will show you a list of credentials that have been saved for a network share or remote desktop connection.
Click on the drop-down menu of the credential you want to clear and then click Remove.
Then select the other credentials and remove them in the same way.
After you finish, close the window and restart your computer. Then, check if the 0x8004210A error still exists.
Repair corrupted PST file
None of the above methods find you help to repair Outlook PST files. Check if it helps you to fix this error code.