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So, follow the below Office 365 sync problems and login fixes steps to reset Microsoft Outlook settings. After the files get repaired, restart the Outlook program to ensure that the Outlook syncing issues are resolved or not. Outlook sync issues can be because of corrupted Outlook OST or PST files. Therefore, now we will know the steps to repair the Outlook data file.
Method 4: Recreating the Outlook Profile
However once I joined this computer back to the domain and let it sit for a few days it was also working fine. Once the client started using Outlook again after some time has passed the issue had come back. I’ve tried to set cache mode from 1 year all the way down to a few days. If your password isn't the problem, you might have a certificate error. If so, you'll see a message that says, "There is a problem with the server's security certificate. The security certificate repair PST file without data loss is not from a trusted certifying authority."
Check the connectivity to your email server
If you're using an Exchange account that requires advanced settings, you'll need to remove the account and add it again using advanced settings.Knowing the reasons behind the Outlook sync issues will help us to fix this problem and prevent issues in communication and workflow.If two-factor authentication is turned on for your account, you'll need to create an app password for that account.To update from Azure AD Sync to Microsoft Entra Connect, see the upgrade instructions.It verifies your identity using your password and a contact method (also known as security info).If you are still facing this issue, kindly follow the solutions below to fix the sync issues in Outlook.
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 Outlook Not Sending or Receiving Email and connect with a world of communities.
Methods to fix Microsoft Outlook syncing error
If the size of your .ost file is close to the limit, you could try increasing the limit on your client, restart Outlook and see if there is any difference. If you're using an Outlook.com, Microsoft 365, or Exchange account, you won't have advanced mailbox settings unless the account was set up using advanced setup. The client has a computer off the domain at home that his work email is tied to and he has never had any of these issues in Cache mode with that device. I’ve unchecked download shared folders when setting up a new Outlook profile. Check with your email provider for instructions about how to create an app password for your email account. The Mail and Calendar apps for Windows 10 don't support two-factor authentication.
Microsoft Outlook Sync issues
I’ve tried the Microsoft office uninstall tool provided by Microsoft (which deletes more items then just control panel uninstall). Below are the steps I’ve taken to try to resolve this issue. Two-factor authentication helps protect your account by making it more difficult for someone else to sign in. It verifies your identity using your password and a contact method (also known as security info). Outlook will show as connected to Exchange but is not receiving any new email. This can happen for days at a time, and then disappear for a day or 2, only to appear again.