43 yr old Senior Developer Fonz Gaylord, hailing
from Frontier enjoys watching movies like Red Lig... View More
About Me
January 15, 2026
4 views
Content
We have resources to help you identify potential issues and fix them. 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. There can be several reasons for the Outlook synchronization error. Before we know the solutions, we will understand a few common causes of the Outlook sync problem.
Professional automation to resolve Microsoft Outlook syncing issues
This solution will be beneficial for users who are facing Outlook homepage 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. Always make sure your profile and settings are set up correctly, your software is up to date, and your connection is steady. The causes of sync issues and local failures in Outlook are explained in this guide, along with practical troubleshooting and resolution techniques. You can extract and recover all of your mail items to a PST file using sophisticated OST File to PST Converter software if your OST file becomes unavailable or orphaned. Here, we will discuss the five manual methods to fix sync issues in Outlook or OWA.
Now, let us start with the manual processes to fix Outlook syncing errors.The other solution to fix Outlook sync issues is recreating Microsoft Outlook profile.The Support and Recovery Assistant, a tool provided by Microsoft, can identify and resolve common Outlook problems.Follow each step carefully to resolve synchronization errors.You need to login to the correct microsoft account if you need to sync your computer and tablet.When they go back to the message and press send they get an error that the message has been deleted.Here, we will discuss the five manual methods to fix sync issues in Outlook or OWA.
Outlook sync errors with Office 365
It is capable of automatically identifying problems with account setups, sync, and other typical mistakes. To solve your Outlook issues, download the application from the Microsoft website and follow the directions. Now, we will verify the server settings to fix the Outlook synchronization error. Outlook’s ability to connect to the mail server may be blocked by firewalls or antivirus software.
Method 4: Recreating the Outlook Profile
Outlook sync Fix Outlook and Office 365 Errors 2025 issues can be because of corrupted Outlook OST or PST files. Therefore, now we will know the steps to repair the Outlook data file. With directory synchronization, you can continue to manage users and groups on-premises and synchronize additions, deletions, and changes to the cloud. But setup is a little complicated and it can sometimes be difficult to identify the source of problems.
How do I get Microsoft Entra Connect tool?
There are various methods to resolve the Outlook sync issues, including manual and third-party solutions. Firstly, we will discuss a few manual methods to resolve this Outlook error and share the stepwise procedure of each method to successfully troubleshoot Outlook synchronizing folders error fix synchronization issues. Now, let us start with the manual processes to fix Outlook syncing errors. If users are facing syncing issues in Outlook due to corrupt Outlook data files, they must choose a professional tool, like Shoviv OST to PST Converter Tool.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. To make sure there are no issues, click Test Account Settings to test the connection. Test other programs or websites to be sure Outlook is the only problem.
Be the first person to like this.
January 12, 2026
7 views
Content
These steps are provided in a specific order based on commonality and complexity. Find solutions to common problems or get help from a support agent. The folder may have been deleted or the server where the folder is stored may be unavailable. You don't modern authentication troubleshooting have appropriate permission to perform this operation. Note that you can quickly tell how your mail is currently sorted, by the presence of a small triangle on the field headers.
Outlook Known issues in July 2022 updates
For more information, see How to install the latest applicable updates for Microsoft Outlook (US English only). There is a new version of outlook that is web based, but still works like an app, and has less problems. The loading of unregistered MAPI services has been disabled by default to make Outlook more secure. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. Maybe you've added a new program to your computer that doesn't get along with Outlook, or your system has a virus. Regardless of the specific cause, there are several key troubleshooting fixes to try that might help.
After updating Office, you may experience a brief flashing window every hour, which triggers the OfficeBackgroundHandlerRegistration task to start running.The person who sent you the invitation will need to remove your permissions and then send a new invitation.You must have at least three user accounts on the computer to complete these steps.The built-in search will display the message below to indicate it is not using the Windows Search service.To access the calendar shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android.Your user profile is a collection of settings that let you customize the computer appearance and performance.
Outlook Known issues in April 2024 updates
If your antivirus software includes integration with Outlook, you may experience performance issues. You can disable all Outlook integration within the antivirus software. Or, you can disable any antivirus software add-ins that are fix Outlook after Windows update issues installed in Outlook. If you have email messages in an email program, you must import your email messages and addresses to the new user profile before you delete the old profile.
Some Junk Mail goes to Inbox after configuring Junk Email Options to "Safe Lists Only"
Please install the latest updates on your phone to resolve the issue. If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account. When you start Windows normally, several applications and services start automatically and then run in the background. A Selective Startup or "clean boot" process can help you identify problems that are caused by application conflicts.
Outlook Known issues in July 2024 updates
We're working to make it possible to edit shared calendars in Outlook 2016 for Windows. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. If you use the cloud-based Microsoft 365 on a PC or Mac, the automated Support and Recovery Assistant tool can diagnose and fix many issues, including Microsoft Outlook not starting. You may have to contact your antivirus software vendor to determine how to configure the software to exclude any integration with Outlook or to exclude scanning in Outlook. For a list of antivirus software vendors, see Consumer antivirus software providers for Windows. If the problem doesn't occur after you restart Outlook, one of the add-ins is likely the cause of the problem.
If you are having problems with Outlook, there are a few things we can help with to get you back to sending and receiving your email. Here are some common fixes that should work when Outlook doesn't look at this now open, whether you're using Windows or a Mac. To manage your mailbox by using the AutoArchive feature, see AutoArchive settings explained. We recommend that you move several items in your larger folders to separate folders, or that you archive those items by using the AutoArchive feature.
When you install Outlook, an Inbox repair tool (scanpst.exe) is also installed on your PC. The Inbox repair tool can resolve problems by scanning your Outlook data files, and repairing errors. To use the Inbox repair tool, exit Outlook, and then follow the steps in Repair Outlook Data Files (.pst and .ost).
Be the first person to like this.
January 12, 2026
7 views
Content
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 mode to only cache 1 year. For the soft match to work, the object to be soft-matched with shouldn't have any value for the immutableId attribute.
Fix the InvalidHardMatch error
When Microsoft Entra ID attempts to soft match two objects, it's possible that two objects of different "object type," like user, group, or contact, have the same values for the attributes used to perform the soft match. Because duplication of these attributes isn't permitted in Microsoft Entra ID, the operation can result in an ObjectTypeMismatch sync error. There are various methods to resolve the Outlook sync issues, including manual and third-party solutions. Firstly, we will discuss a few manual methods to resolve this Outlook error and share the stepwise procedure of each method to successfully fix synchronization issues. Now, let us start with the manual processes to fix Outlook syncing errors.
If you need to clear an InvalidHardMatch error and match the account successfully, you can enable hard match again as described in Hard-match vs Soft-match. After performing these steps, Outlook’s all folders will be synced to the server. If this method doesn’t troubleshoot Outlook synchronizing folders error work for you, navigate to other solutions. The Users Loaded count will be 0 if all users fail to meet the system's requirements for user records.
Fix the Existing Admin Role Conflict error
If you don't wish an inactive user to be made active by the M365 sync, you can add the user's email address to the sync forbid list. You can do this in the Microsoft 365 Sync Wizard on the configuration page of your platform FixTechGuide Windows update Outlook fix settings. Review the user properties and remove attribute values that might no longer be required.
Mailing Address
Knowing the reasons behind the Outlook sync FixTechGuide login issue guide issues will help us to fix this problem and prevent issues in communication and workflow. Both of our authentication methods can fail if the Enterprise Applications entry for the sync in Azure AD is deleted or if it has had its permissions modified. Find out what to do if you are having issues with syncing users or groups from Microsoft 365. The Microsoft Entra Connect client is failing to delete users during migration from hybrid to cloud only, resulting in Error Type 114. Microsoft Entra ID enforces various restrictions on the data itself before allowing that data to be written into the directory. These restrictions are to ensure that end users get the best possible experience while using the applications that depend on this data.
What should I do if my sync failed due to authentication issues?
The system requires that users have a first name, last name and a valid email address that conforms with your domain lock if enabled. To get the sync working you will either need to delete users or have the user limit on your account increased. The most common reason for missing users is that you've run a Test Sync, instead of a Manual Sync.
Outlook sync issues can be because of corrupted Outlook OST or PST files.Users can also try its free demo version in their system and process the first 50 items from each folder freely.For the soft match to work, the object to be soft-matched with shouldn't have any value for the immutableId attribute.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.Incorrect Outlook settings can also be one of the reasons behind Outlook synchronization errors.If you need to clear an InvalidHardMatch error and match the account successfully, you can enable hard match again as described in Hard-match vs Soft-match.
For more information, see Microsoft Entra userPrincipalName population. 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. After the files get repaired, restart the Outlook program to ensure that the Outlook syncing issues are resolved or not.
If users are facing syncing issues in Outlook due to corrupt Outlook data files, they must choose a professional tool, like Shoviv OST to PST Converter Tool. This software allows users to process numerous OST files at once without any size limitations. Moreover, it maintains the folder hierarchy and metaproperties of the data when processing Outlook data files.
Method 4: Recreating the Outlook Profile
You can stop any accounts from being brought over by adding them to the sync deny list. This means that the authentication setup for your sync is no longer valid. This can happen for the a number reasons particularly if your sync authenticates using Delegated Permissions. You will need to have the correct privileges set on your Azure account in order to set up the M365 sync. This section discusses LargeObject or ExceededAllowedLength errors.
Be the first person to like this.
January 12, 2026
6 views
Content
While M365 is highly stable, it’s not immune to occasional disruptions. For details see Identify directory inbox repair tool alternative synchronization errors in Microsoft 365. 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.
Free Methods to Remove Duplicate Items in Outlook 2016
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. There can be several reasons for the Outlook synchronization error. Before we know the solutions, we will understand a few common causes of the Outlook sync problem.
Microsoft 365 Outlook Sync Issues on Windows 10 PC
TrustedTech is a Microsoft solutions Partner in the following areas. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
Related Customer Questions
This tool also helps users fix Outlook syncing issues by repairing OST or PST files and syncing the data smoothly. There are various methods to resolve the Outlook sync issues, including manual and third-party solutions. Firstly, we will discuss a few manual methods to resolve this Outlook error and share the stepwise procedure of each method to successfully fix synchronization issues. Now, let us start with the manual processes to fix Outlook syncing errors. The sync will fail if the total number of all users (active or inactive) on your account exceeds the user limit placed upon it if present.
Our relationship to the Microsoft Partner Network credential loop in Microsoft 365 allows us to provide competitive pricing and authentic software and support, all with a much-needed human element. TrustedTech is a Microsoft CSP Direct Bill Partner with all six Solutions Partner designations and decades of expertise in licensing, support, and cloud infrastructure. If you're looking for smarter ways to manage, secure, or optimize your Microsoft 365 (M365) environment, our U.S.-based team is here to help.
What should I do if my User Limit has been exceeded?
So, follow the below steps to reset Microsoft Outlook settings. 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 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. The most common reason for missing users is that you've run a Test Sync, instead of a Manual Sync. If that doesn't resolve your missing users issue, please follow our guide to troubleshooting missing users below.
You need to login to the correct microsoft account if you need to sync your computer and tablet. You will need to have the correct privileges set on your Azure account in order to set up the M365 sync. We go above and beyond the average software reseller because we built our business on trust.
Outlook sync errors with Office 365
As active members clear Outlook credentials manager in the IT community, we work to support our clients’ businesses and provide them with peace of mind. Boost your SMB’s security and compliance with Microsoft 365 Business Premium. Discover Defender and Purview add-ons for enterprise-grade protection at SMB-friendly pricing. We are a paid-for question and answer site and not affiliated with any other company.
There can be several reasons for the Outlook synchronization error.Users can also try its free demo version in their system and process the first 50 items from each folder freely.There are various methods to resolve the Outlook sync issues, including manual and third-party solutions.Before we know the solutions, we will understand a few common causes of the Outlook sync problem.The sync will fail if the total number of all users (active or inactive) on your account exceeds the user limit placed upon it if present.With apps syncing across devices and cloud services, sync issues are among the most frequently reported M365 problems.The error message in the Summary sheet of the Sync Summary spreadsheet attachment can also highlight the reason for this.
With apps syncing across devices and cloud services, sync issues are among the most frequently reported M365 problems. These can include missing files, ghost icons, or documents that do not update in real-time. With directory synchronization, you can continue to manage users and groups on-premises and synchronize additions, deletions, and changes to the cloud. But setup is a little complicated and it can sometimes be difficult to identify the source of problems. We have resources to help you identify potential issues and fix them. Incorrect Outlook settings can also be one of the reasons behind Outlook synchronization errors.
Be the first person to like this.
January 12, 2026
4 views
Content
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. Here, we will discuss the five manual methods to fix sync issues in Outlook or OWA. Before finding solutions, we suggest that users check their internet connection. Sometimes, Outlook sync issues can arise because of poor internet connection. If you are still facing this issue, kindly follow the solutions below to fix the sync issues in Outlook.
Step 5 – Reset IMAP Folder Path (For IMAP Accounts)
For more information, see the More information section of this article. After performing these steps, Outlook’s all folders will be synced to the server. If this method doesn’t work for you, navigate to other solutions.
Increase Server Timeout Limits
We have shared five manual methods in this blog to resolve the Outlook syncing errors.If the test message sends successfully but folders don’t sync, move to the next step.The tool records any differences in a scan log so that you can see what differences the tool found and resolved.For persistent problems, rebuild your Outlook profile or use FixTechGuide’s free diagnostic tools to automate detection of authentication and IMAP errors in seconds.Apart from this, we also discuss the Shoviv OST to PST Converter Tool, a professional way to repair, recover, and convert Outlook data files.It scans your local copy of the .ost file and your mailbox on an Exchange Server.After these instructions, ensure the sync settings are correct and check everything is working well.If you have a slow internet connection or large mailboxes, default timeouts may be too short.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. If you have a slow internet connection or large mailboxes, default timeouts may be too short. Faulty add-ins (especially antivirus or CRM extensions) can freeze Outlook during synchronization. For a similar error caused by a different issue, refer to Outlook shows Disconnected in status bar if the last character connection status shows disconnected in legacyExchangeDN is a space. This mode is ideal for slow connections or intermittent server responses.
Office 365 Activation Failed — Error 0xC004F074 (2025 Fix)
The OST Integrity Check Tool does not change your mailbox on the Exchange Server. The tool records any Microsoft Outlook Email Repair Tool Online differences in a scan log so that you can see what differences the tool found and resolved. The scan log also identifies any situations that the tool could not resolve and that you must fix manually. 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.
Fix Outlook and Office 365 Sync Issues (2025 Complete Guide)
This software also has a splitter option to split large-sized PST files into smaller ones, helping users prevent oversized PST file issues. Once you have completed the steps to fix Outlook sync errors, kindly check if the error has been fixed or not. Follow these steps in order—from quick fixes to deeper technical repairs. Download the tool from Microsoft and run the Outlook diagnostic to auto-detect server and account issues. When synchronization issues occur in Microsoft Outlook or in Microsoft Outlook Web App (formerly Outlook Web Access), you may experience the following symptoms.
Manual solutions to resolve Outlook synchronization issues
There are various methods to resolve the Outlook sync issues, including manual and third-party solutions. Now, let us start with the manual processes to fix Outlook syncing errors. The other solution to fix Outlook sync issues is recreating Microsoft Outlook profile. After the files get repaired, restart the Outlook program to ensure that the Outlook syncing issues are resolved or not.
Before you dive into folder sync issues, read our complete Outlook and Office 365 Sync Guide for an overview of how synchronization works. By limiting synchronization to active folders, Outlook finishes updates faster and troubleshoot Outlook synchronizing folders error avoids timeouts. Use the OST Integrity Check Tool (Scanost.exe) to check your .ost file for inconsistencies. When these symptoms occur, or you have other problems synchronizing, the problem might be a corrupted .ost file. 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 issue usually happens when Outlook cannot properly connect or sync with your mail server. In this FixTechGuide tutorial, we’ll explore the causes and give you clear, step-by-step solutions to fix it fast. Now, we will verify the server settings to fix the Outlook synchronization error. Incorrect Outlook settings can also be one of the reasons behind Outlook synchronization errors. 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.
Be the first person to like this.