I am using TB for just three weeks now and I have issues daily when sending mail with no attachments the outgoing mail server will time out. Since the sync issue is universal it appears to be a global issue. Perhaps something in TB needs to be tweake


Also, different cloud services, service plans, and licenses might be assigned to the account, which consume even more attributes and contribute to the overall size of the object. The admin adds a new user or contact in on-premises Active Directory that isn't synced to Microsoft Entra ID yet with the same value for the proxyAddresses attribute as that of the Microsoft 365 group. Now, we will verify the server settings to fix the Outlook synchronization error. Once you have completed the steps to fix Outlook sync errors, kindly check if the error has been fixed or not. The troubleshoot Outlook Synchronizing folders error sync will fail if the groups you selected to load users from no longer exist in Azure A

You can create a new Outlook Data File and drag the items in the Lost and Found folder into the new data file. After you've moved all the items, you can remove the Recovered Personal Folders (.pst) file, including the Lost and Found folder. You can use the Inbox Repair tool (SCANPST.EXE) to diagnose and repair errors in your Outlook data file. The Inbox Repair tool checks the Outlook data files on your computer to see if they're in good shape. After locating the ScanPST, launch the tool and follow these steps to repair the PST file.

Press Windows + R key, type ‘Outlook.exe /safe’ in the Run window, and click the OK button or press the Enter key. If the issue is resolved, try disabling the add-ins as there could be faulty or incompatible add-ins causing the problem. Restart Outlook normally to check if the issues or errors you encountered are resolved. Then click on Add to create a new profile and fill account details and Outlook will recreate Outlook profile.


It indicates that you have reached the storage limit specified by your subscription plan. For example, items that you delete from SharePoint or Microsoft Teams are retained in the recycle bin for a certain period before permanent deletion. Therefore, you can locate the original files at their primary SharePoint site and restore them from there. File and storage issues with Microsoft Office 365 are more serious than troubleshoot Outlook Synchronizing folders error other issues. They are not merely inconvenient and slow down work but can also lead to critical data loss. The good news is that the majority of problems can easily be solved on the client’s sid


You can assign the administrative role to the existing user object again after the soft match between the on-premises user object and the Microsoft Entra user object has finished. The M365 sync establishes a synced dataset based on your M365 data and the filtering configuration of your sync. The sync will fail if it troubleshoot Outlook Synchronizing folders error can't find any users that comply with your filtering preferences or the system's requirements for user records. The system requires that users have a first name, last name and a valid email address that conforms with your domain lock if enabled. Microsoft Entra Connect isn't allowed to soft match a user object from on-premises AD with a user object in Microsoft Entra ID that has an administrative role assigned to it. For more information, see Microsoft Entra userPrincipalName populatio


If you are forced to use IMAP, I would recommend switching to an alternative E-Mail client like Thunderbird Thunderbird — Free Your Inbox. Hate to be a Debbie Downer, but why are you using IMAP? A primary way to compromise an O36 user is phish a user, steal their creds, and connect via IMAP to get a copy of a whole mailbox. By reporting abuse, a moderator will be asked to review the content of this interaction to take further action, if necessary. While outlook supports IMAP, it doesn’t really want to work with it, so not surprised you are having some troubles. My phone, which I have no problems with, is behind the same router/firewall as the PC on a regular basi


If your account is locked but you have not defined your recovery email address, try to fill troubleshoot Outlook Synchronizing folders error out the Microsoft account recovery form. If you want to use Office 365 applications installed on a terminal server, you should use Office 365 Pro Plus, which supports Shared Computer Activation. If multiple versions of Microsoft Office are installed, Office 365 activation issues may occur. Uninstall old versions of Microsoft Office from your computer and try to activate Microsoft Office 365 agai


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 file