Outlook Error 0x80040900 typically occurs when there is a problem with the server settings or an issue with the network connection. To resolve this manually, you can check your email account settings to ensure that the incoming and outgoing mail server addresses are correct. Additionally, verify your network connection, restart your router, or temporarily disable any firewall or antivirus software. However, these manual solutions can be time-consuming and don’t always guarantee a fix.
For a faster and more reliable solution, the DRS PST Recovery tool is a great option. This tool can repair corrupt PST files and fix Outlook error 0x80040900 that may be caused by corrupt PST Files and help recover your emails, contacts, calendars, and other Outlook data. With its user-friendly interface, you can quickly restore your Outlook without worrying about further disruptions. It also provides an added layer of protection by allowing you to back up your PST files online, preventing future errors.