When he reboots his laptop, he cannot connect to Exchange via Outlook. If he flushes DNS, fix MFA prompts not working he can reconnect even though the address/host name doesn’t change and his pingpath is unaltered. Imagine being able to load websites faster just by executing this simple command! This procedure proves especially useful if you’ve noticed that certain web pages are loading slowly or displaying outdated information after changes were made in your network configuration. This often happens because the cached DNS record is stale or incorrect.

• Occasionally, users may flush their DNS cache only to realize that issues persist, such as slow-loading sites or connection errors.
• For Mac users, you can use Terminal and run the command `sudo killall -HUP mDNSResponder` for macOS Mojave and later versions; this process clears outdated entries and can help resolve connectivity issues.
• By adopting flushing DNS cache as part of your routine tech maintenance, you’re better equipped to tackle frustrating internet issues while enhancing both speed and security.
• Often overlooked, this step can be remarkably effective since it allows your operating system to refresh its processes and resolve any lingering issues that might be causing connectivity problems.
• When you navigate to a website, your system refers to the DNS cache to find the related IP address.
• For instance, you might find that a website fails to load despite your internet being otherwise active.
• It’s happened twice today, where I get a PC which is not connecting to Exchange server.

Solutions to Fix the Sync Issues in Outlook

A large OST file can lead to performance issues and result in Outlook not syncing with the Exchange Server, disrupting your workflow. To resolve this, you can reduce the Outlook data file (OST) size. This can help optimize Outlook’s performance and fix the synchronization issues.

How to Resolve Sync Issues in Outlook – A Detailed Guide

This professionalOST to PST converter toolcan extract data from the backup OST file and convert it into PST file, which you can easily import into Outlook. You can easily search for the missing items, select them, and save them in PST and other file formats, such as MSG, EML, RTF, HTML and PDF. This tool is designed to extract mailbox items from orphaned or inaccessible OST files.

Method 12: Disable Security Applications

If not, you can completelyuninstall Microsoft Office and then reinstall it. Now, restart Outlook and check if Outlook synchronization is working. You can check the error message to find the cause behind the sync issue and fix it. If an external address just do your own forward lookup zone in your DNS servers and deal with it there for your internal clients. He can connect fine at home thus far, this issue seems present only when connected to our internal network.

Flushing DNS Cache: A Step-By-Step Guide to Troubleshoot Your Connection

During the scanning process, security applications, like antivirus mailbox not updating on IMAP software or Windows Firewall might lock the Outlook data file, leading to the sync issues. To check if the security application is causing the issue, you can temporarily disable the antivirus program or Firewall and then update the folders. If the issue is resolved, it indicates that your antivirus software or Firewall is interfering with Outlook.



I have no issues sending email from same account from my phone, laptop, or web mail. Moving forward from a simple reboot, we now focus on ensuring that your network settings are configured correctly. If prompted, enter your password—this is required for administrative privileges. Remember that while you send/receive error 0x800CCC0E fix type your password, no characters will appear in the Terminal for security reasons; just hit Enter once you’ve typed it. But beyond just solving existing problems, understanding how this process works can help enhance your overall browsing experience.