By Ivy / Last update January 5, 2022

Offline Files Windows 10 Cannot Synchronize Access Is Denied

“I've come across a weird issue that surfaced when I was off last week, which was misdiagnosed at the time, but I can't quite find the root cause of.

We have folder redirection for most user profiles, and use offline files so people can access those files even if they are disconnected from the network (e.g. if there's a connectivity problem, or they are elsewhere).

Since Friday morning, users have experienced issues with their offline files. They can create files, and save back to the file server (The file server is on Server 2016) if they are connected. But they cannot open the file they have created or any existing files when offline.

If I disable offline files, the access denied issue disappears. The issue reappears when I re-enable offline files.

I have tried re-initialising the offline files cache, to no effect. The same if I delete a user profile and get it to repopulate. Any ideas?”

How to Fix Offline Files Access Is Denied Error

For offline files access is denied error, there are some possible reasons, such as, lack of permission, file encryption, etc. Don’t worry about it and fix it with given solutions in the following.

Method 1: Windows Folder Redirection Access Denied

The access denied error may occur if you put the user’s subfolder under a root shared folder and use \\server_name\root_folder\user_name as mapped drive path.

To fix this error, you should grant all users read permission at least on the root folder, and then you can sync files between server computer and local computer, Because the offline folder will check the user’s permission on the root share when you establish file synchronization.

Method 2: Offline Files Encryption Access Denied

File encryption can be another reason why you receive “offline files Windows 10 cannot synchronize access is denied”. And the offline files encryption may be automatically enabled after you select a network type, ie, public, home, office when connecting to a new network.

To disable offline files encryption, double-click the Sync Center icon on the taskbar, then pitch on the “Manage offline files” option and hit “Unencrypt” under the “Encryption” tab.

Unencrypt Offline Files

Method 3: Reset Offline Files Cache in Windows 10

No matter what the reason, resetting offline files caches can be the last resort to fix offline files access is denied error.

To make it, go to the following registry key, create a new 32-bit DWORDValue named FormatDatabase and set its value to 1, then restart your computer. After that, all offline database cache will be cleared.


Reset Offline Files Database Cache

Sync Offline Files in Windows 10 with Sync Center

Supposing you have already enabled offline files and make files always available offline, here I only talk about how to sync files.

Open “Sync Center” and click “View sync partnerships”, then select Offline Files under the Folders (1) link and click “Sync” to start file synchronization. If you want to schedule sync offline files, click “Schedule” and follow the on-screen instructions to set it up.


Notes: If you have problems syncing offline files, you can try Method 4 or Method 5 in the offline files sync pending to force offline files sync using command line. But if it is not working, deleting offline files in Sync Center and use an easier way to sync them is also a good choice.

  • Select Manage offline files in the Sync Center and then scroll down to View your offline files.
  • Then, locate all the offline folders and files on the network drive and select Delete Offline Copy. And you can use Copy option to recover offline files caches in Windows 10.

Delete Offline Copy

  •  Afterward, disable offline files in the Sync Center.

Easier Way to Sync Network Files to Local Drive in Windows 10/11

It is actually a waste of time to find a working solution every time you encounter “offline files Windows 10 cannot synchronize access is denied” error or other problems, such as,  offline files sync pending, offline files not syncing automatically, enable offline files greyed out etc. And its core of offline file sync is to sync network files to local drive, so you can access it on your computer at any time you want.

Thus, you can use a reliable file sync software like AOMEI Backupper Standard to achieve the same goal by adding network path as source and then selecting a local path to store it. And you can enjoy some advantages in the following:

Schedule Sync: It support syncing network files in daily, weekly, monthly.
Multiple sync storage: It supports syncing network files not only to local drive, but also to external hard drive, NAS, cloud drive, etc. Also, syncing files between two computers are supported.
Various Windows system: It can be used on Windows7/8/8.1/10/11/XP/Vista.

Then, let’s have a closer look at how to sync network files locally. Please download and install AOMEI Backupper Standard on the computer you want to save network files on.

Download Freeware Win 11/10/8.1/8/7/XP
Secure Download

Step 1. Launch this software, click “Sync” and “Basic Sync” to start the network file sync.

File Sync

Step 2. Click “+ Add Folder” and then "Share/NAS"to select the network shared folder need syncing. Then, select a folder on the current computer to store these files. 

Add Folder

◐ Only the shared folder can be accessed on a different computer, so please share the folder you want to sync files from. 
◐ To add an extra layer of your data, you can choose to sync local folder to OneDrive if your computer is Windows 10 with OneDrive installed. It allows you to access data on different computers.

Step 3 (optional). Click “Schedule Sync” > "Enable Schedule Sync" and then “OK” to enable daily sync. Also, you can change it to weekly or monthly. At last, click “Start Sync” and wait until the task is completed 100%.

Sync Network Files to Local Drive

◐ The core of Basic Sync is one-way file sync, which only syncs files and changes made in the source folder to the destination folder. To sync files and changes in both sides, try "Two-Way Sync" as instead.
◐ Don’t modify the source folder name of the schedule sync task, otherwise the program cannot synchronize the selected folder anymore.
◐ By default, this sync feature will not automatically sync the deleted files in the source folder. But you can enable it by ticking "Sync the deletions in the source directory to destination" in the "Option" settings.
◐ To monitor changes in real time and sync them from source to destination immediately, you could consider using “Real-time Sync” in AOMEI Backupper Professional.

Written in The End

It's advisable to try the above methods to fix the “Offline files Windows 10 cannot synchronize access is denied” error and then sync network files to local drive with Sync Center. But if you cannot fix it or want an easier way, you can use free file sync software like AOMEI Backupper Standard to do so.

With it, you can not only perform offline file sync, but also sync network files to any storage as long as it can be detected by Windows, such as,  external drive, network drive, Microsoft OneDrive etc. And you can set the sync frequency for it, such as, daily, weekly, monthly. But if you want to sync files in real-time, please try "Real-Time Sync". in the professional version

Also, it still supports "Mirror Sync (to avoid modification or deletion in the destination folder or add new files in it)" and "Two-Way Sync" to help you sync files. What are you waiting for? Download it to have a try right now!