If you can sync your email when the firewall is turned off, you'll need to allow the Mail and Calendar apps through the firewall. Windows Defender Security Center is free security software that's included with Windows 10. If you haven't installed alternative security software, you should temporarily turn off Windows Defender Security Center. Test other Outlook OST vs PST repair programs or websites to be sure Outlook is the only problem.

Method 4: Recreating the Outlook Profile

Another which is shown below, is a user opens a new message, or replies to one, and lets it sit for a while. When they go back to the message and press send they get an error that the message has been deleted. Ive repaired the OST and changed cache Fix Outlook and Office365 Sync Issues mode to only cache 1 year.

Check the connectivity to your email server

• We have resources to help you identify potential issues and fix them.
• There are various methods to resolve the Outlook sync issues, including manual and third-party solutions.
• The Support and Recovery Assistant, a tool provided by Microsoft, can identify and resolve common Outlook problems.
• Below are the steps I’ve taken to try to resolve this issue.
• Firewalls and antivirus software might prevent you from syncing your email and calendar events.
• This solution will be beneficial for users who are facing Outlook syncing issues because of corrupted PST or OST files.

However, his OST file is not anywhere near that size it’s about 5GB. I was wondering if anyone had some insight into an issue I am having with a client. Additionally, you might want to make a new profile and make it the default to see if it fixes the problem. Create your account expert Outlook tips by FixTechGuide and connect with a world of communities.

Methods to fix Microsoft Outlook syncing error

To solve your Outlook issues, download the application from the Microsoft website and follow the directions. If I check the sync log I see a lot of sync errors for Inbox, sent items and a few other folders. The most common cause of an out-of-date account is an incorrect password. In the notification bar at the top of the app, select Fix account. If your password is incorrect, you'll see a message asking you to update your password.

Microsoft Outlook Sync issues

This blog talks about the causes behind Outlook synchronization errors and a few solutions to fix Outlook sync issues. We have shared five manual methods in this blog to resolve the Outlook syncing errors. Apart from this, we also discuss the Shoviv OST to PST Converter Tool, a professional way to repair, recover, and convert Outlook data files. This solution will be beneficial for users who are facing Outlook syncing issues because of corrupted PST or OST files. Users can also try its free demo version in their system and process the first 50 items from each folder freely.