If the connection is poor, consider restarting your modem/router or moving to a more reliable network. You will need to have the correct privileges set on your Azure account in order to set up the M365 sync. We're in the process of migrating from On-Premise Exchange to O365. I have a couple of Users and a Shared Mailbox that were migrated and both Users are experiencing issues with the Shared Mailbox updating on a regular basis. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Additionally, you might want to make a new profile and make it the default to see if it fixes the problem.

Common Causes of Sync Issues in Outlook

Typically this is because the selected groups have been deleted from Azure AD since the M365 sync was configured on your account. 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, you might need to include Outlook exceptions in the settings of your security program. After viewing, see fixing problems with directory synchronization for Microsoft 365 to correct any identified issues. After performing these steps, Outlook’s all folders will be synced to the server.

Fixing problems with directory synchronization for Microsoft 365

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 repair PST file without data loss send they get an error that the message has been deleted. Ive repaired the OST and changed cache mode to only cache 1 year.

• To get the sync working you will either need to delete users or have the user limit on your account increased.
• Users can also convert OST files into various file formats, including PST, HTML, EML, MSG, vCard, etc.
• The error message in the Summary sheet of the Sync Summary spreadsheet attachment can also highlight the reason for this.
• I have multiple users experiencing sync errors with Outlook and office365.
• The sync will fail if the groups you selected to load users from no longer exist in Azure AD.
• If it does, you might need to include Outlook exceptions in the settings of your security program.
• You will need to have the correct privileges set on your Azure account in order to set up the M365 sync.

Use the Microsoft Support and Recovery Assistant

If you are still facing this issue, kindly follow the solutions below to fix the sync issues in Outlook. 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.

How to Fix Outlook Sync Issues in Windows?

The Support and Recovery Assistant, a tool provided by Microsoft, can identify and resolve common Outlook problems. inbox repair tool alternative 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.





You can view your inactive users on the Users page and delete them as you see fit. Similarly you should review solve Office 365 mailbox sync delays 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.





The error message in the Summary sheet of the Sync Summary spreadsheet attachment can also highlight the reason for this. 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.

Fix Sync Issues and Local Failures in Microsoft Outlook: Problem Resolved!

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 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.