It is a normal Outlook function, and these messages act as error-checking mechanisms for programs that use it for rebuild Outlook data file quickly syncing email services. In this article, we will discuss the synchronization issues in folders, and the method to solve it manually and automatically with the excellent Outlook Repair software. If these methods do not resolve the issue, we recommend that you rebuild the .ost file. To do this, delete the .ost file, and then let Outlook download the information again from Exchange Server. For more information, see the More information section of this article.

Solution 4: Disable Antivirus and Firewall Temporarily

If restarting Outlook or fixing the profile doesn’t work, converting the OST file is often the next step. EdbMails OST to PST Converter can help in these cases by recovering data from the inaccessible OST files and restoring them without data loss. Outlook sync issues can be because of corrupted Outlook OST or PST files. Therefore, now we will FixTechGuide support for Office 365 know the steps to repair the Outlook data file. Sometimes because of a corrupted OST file synchronization process stops functioning properly and thus leads to error.

Solution 7: Create a New Profile

Sometimes this process gets corrupted, and this leads to sync errors. We recommend using the automatic process and fix the issue with Wondershare Repairit for Email. This excellent software is easy to use and fixes the issue quickly. Whether it's a bigger file size or smaller, the software can repair all file types with any level of corruption. Once you have completed the steps to fix Outlook sync errors, kindly check if the error has been fixed or not. Knowing the reasons behind the Outlook sync issues will help us to fix this problem and prevent issues in communication and workflow.

Solution 8: Rebuild Outlook Data File (OST)

In order to determine the number of folders and subfolders that are in a mailbox or folder, run FixTechGuide email error solutions the Get-MailboxFolderStatistics cmdlet. You must select the Folder List module on the Navigation pane to see the Sync Issues folder in your mailbox. Please whitelist stellarinfo.com and request to send the link again.

Solution 1: Update the Outlook Application

If you are still facing this issue, kindly follow the solutions below to fix the sync issues in Outlook. If you have problems when you try to open your .ost file, you can use the Inbox Repair tool (Scanpst.exe) to diagnose and repair errors in your .ost file. The Inbox Repair tool can be used on both .ost files and on Personal Folders (.pst) files. The Inbox Repair tool scans the .ost or .pst file and makes sure that the file structure is intact. The tool also tries to repair the internal data structures, if it is necessary. The tool does not interact with your mailbox on the Exchange Server.

• In Outlook 2007, this problem is more likely to occur if you also have the following registry data configured on your Outlook client.
• The OST Integrity Check Tool (Scanost.exe) is installed when you install Outlook in the following locations, as appropriate for the Outlook version that you are running.
• For more information, see the More information section of this article.
• Follow each step carefully to resolve synchronization errors.
• So, follow the below steps to reset Microsoft Outlook settings.

Incorrect Outlook settings can also be one of the reasons behind Outlook synchronization errors. So, follow the below 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. You can see the synchronization status here and your new .ost file now. As it is the replication of the existing information of Exchange Server mailbox, so the complete process does not cause any damage to the information. See your Exchange Server administrator for this information or permissions.



Users can also convert OST files into various file formats, including PST, HTML, EML, MSG, vCard, etc. It also provides the option to export the Outlook OST file into Office 365 and Live Exchange mailboxes. This software also has a splitter option to split large-sized PST files into smaller ones, helping users prevent oversized PST file issues.