Access Denied When Using StorageProviderSyncRootManager

Luke Blevins 6

if (StorageProviderSyncRootManager.IsSupported())
{
     var syncRoots = StorageProviderSyncRootManager.GetCurrentSyncRoots();
     foreach(StorageProviderSyncRootInfo syncRootInfo in syncRoots)
     {
           var cloudStorageItem = new DriveItem()
           {
                Root = syncRootInfo.Path as StorageFolder,
                Text = syncRootInfo.DisplayNameResource,
                VirtualDriveIconPath = syncRootInfo.IconResource,
                Path = syncRootInfo.Path.Path,
                Type = DriveType.VirtualDrive,
            };
            list.Add(cloudStorageItem);
      }
}

Unfortunately, this code returns an ACCESS_DENIED on the first line. I have broadFileSystemAccess capability granted and the Desktop Extension properly referenced in my app manifest. Other people online are having this same problem, so I'd prefer someone knowledgeable with WinRT answer this one.

Luke Blevins 6 Reputation points

2020-11-05T17:13:32.377+00:00

Here's the stacktrace:

Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))|System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
at System.StubHelpers.StubHelpers.GetWinRTFactoryObject(IntPtr pCPCMD)
at Windows.Storage.Provider.StorageProviderSyncRootManager.IsSupported()
at Files.Filesystem.DrivesManager.GetVirtualDrivesList(IList`1 list)
at Files.Filesystem.DrivesManager.EnumerateDrives()
at System.Threading.WinRTSynchronizationContextBase.Invoker.InvokeCore()
Richard Zhang-MSFT 6,936 Reputation points

2020-11-06T07:32:35.46+00:00

Hi @Luke Blevins , I have reproduced this problem and will report it to the team. If there is new progress, I will post it here.
Luke Blevins 6 Reputation points

2020-11-12T01:49:49.057+00:00

Hi Richard. Did you hear back from the team? This failing to work has blocked us from adding cloud storage provider support to our project.
Richard Zhang-MSFT 6,936 Reputation points

2020-11-12T07:22:29.29+00:00

Hello, sorry for the late reply. No new information about this issue has been received yet. I will continue to follow up. You can also report this issue in the Feedback Hub app.
Richard Zhang-MSFT 6,936 Reputation points

2020-11-13T07:30:28.303+00:00

Hello @Luke Blevins , The related team is working on this issue.
Luke Blevins 6 Reputation points

2020-11-13T13:13:34.357+00:00

Thank you for sharing my issue with the team!

When the fix ships, will it ship out-of-band or with the SDK vNext? We have a temporary solution implemented now, but having this API working would simplify our sync root implementation.
Luke Blevins 6 Reputation points

2021-01-24T03:38:32.503+00:00

Hi Richard. Has there been any progress in implementing a fix for this broken API? We're still looking to use it.
jie yang 1 Reputation point

2021-09-15T08:17:55.82+00:00

Hi, have you resolve this issue? could you tell me how to fix it?
jie yang 1 Reputation point

2021-09-15T08:27:14.47+00:00

Hi, have you resolve this issue? could you tell me how to fix it?
Kavya K G 0 Reputation points

2023-10-18T18:36:28.7033333+00:00

Hi, have you resolve this issue? could you tell me how to fix it?
Daniel Troyano 0 Reputation points

2024-06-23T16:42:08.5966667+00:00

Yes quite peculiar indeed...

1 answer

Ben Polinsky 1 Reputation point

2021-07-16T13:02:54.2+00:00

Update:
Actually, it seems the call queries HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders, then other HKCU paths. This seems to be the issue.

Check your Registry permissions for

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SyncRootManager
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Access Denied When Using StorageProviderSyncRootManager

1 answer