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Add Fixing problems with directory synchronization for Microsoft 365 Microsoft 365 Enterprise Microsoft Learn

Eartha Flanagan 2025-12-02 09:20:19 +08:00
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Content<br>
Outlook’s ability to connect to the mail server may be blocked by firewalls or antivirus software. After you’re satisfied, turn off your firewall or antivirus program for a while. If it does, [repair PST file without data loss](https://app.fluence.africa/forums/users/dawna59245/) you might need to include Outlook exceptions in the settings of your security program. The sync will fail if the groups you selected to load users from no longer exist in Azure AD.
Methods to fix Microsoft Outlook syncing error
The Sync Summary email can give further information about this.Always make sure your profile and settings are set up correctly, your software is up to date, and your connection is steady.When they go back to the message and press send they get an error that the message has been deleted.You will need to have the correct privileges set on your Azure account in order to set up the M365 sync.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.
Similarly you should review the Users Deactivated sheet on the sync summary spreadsheet attachment as you can also delete these users to bring your total down. I have multiple users experiencing sync errors with Outlook and office365. 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. The M365 sync establishes a synced dataset based on your M365 data and the filtering configuration of your sync.
Common Causes of Sync Issues in Outlook
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. 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.
[Answered] Secured OST to PST Converter for OST to PST Conversion
To solve your Outlook issues, download the application from the Microsoft website and follow the directions. After the files get repaired, restart the Outlook program to ensure that the Outlook syncing issues are resolved or not. The simplest way to resolve authentication issues is to rerun the authentication process by clicking the Sign in with Microsoft on [credential loop in Microsoft 365](https://indiancrafts79.com/repair-outlook-profile-for-office-365-and-exchange-account-3/) the Microsoft 365 settings page. You run the Microsoft consent process using an eligible M365 account after which you will be taken to the sync's setup wizard.
What should I do if my sync failed due to authentication issues?
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. This tool also helps users fix Outlook syncing issues by repairing OST or PST files and syncing the data smoothly. Here, we will discuss the five manual methods to [fix MFA prompts not working](https://worldaid.eu.org/discussion/profile.php?id=1170144) fix sync issues in Outlook or OWA.
Typically this is because the selected groups have been deleted from Azure AD since the M365 sync was configured on your account. After viewing, see fixing problems with directory synchronization for Microsoft 365 to correct any identified 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. To get the sync working you will either need to delete users or have the user limit on your account increased. 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.
What privileges do I need to authorise the M365 sync?
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. To resolve these issues you should run the steps in this article and check whether the groups in your sync's filtering preference contain users in Azure AD. The Sync Summary email can give further information about this. The Users Loaded count will be 0 if all users fail to meet the system's requirements for user records. The Users Processed count will be 0 is there are no users in the synced dataset after filtering.
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. With directory synchronization, you can continue to manage users and groups on-premises and synchronize additions, deletions, and changes to the cloud.