[GH-ISSUE #323] Calendar sync to Google, error 403 #311

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opened 2026-02-25 20:31:22 +03:00 by kerem · 2 comments

kerem commented

2026-02-25 20:31:22 +03:00

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Originally created by @filippobottega on GitHub (Jul 26, 2021).
Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/323

Syncing an Outlook calendar with Google calendar I get some errors like this:

CalDavSynchronizer.DataAccess.WebDavClientException: Response status code does not indicate success: '403' ('Forbidden'). Message:
<?xml version="1.0" encoding="UTF-8"?>
<D:error xmlns:D="DAV:"/>

   at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<EnsureSuccessStatusCode>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequest>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequestAndReturnResponseHeaders>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at CalDavSynchronizer.DataAccess.CalDavDataAccess.<CreateNewEntity>d__27.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at CalDavSynchronizer.Implementation.CalDavRepository`1.<Create>d__17.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at GenSync.EntityRepositories.BatchEntityRepositoryAdapter`4.<PerformOperations>d__3.MoveNext()

How can I understand the root cause of this issue?

I have attached a sample event that generate the exception.

Quest.zip

Originally created by @filippobottega on GitHub (Jul 26, 2021). Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/323 Syncing an Outlook calendar with Google calendar I get some errors like this: ``` CalDavSynchronizer.DataAccess.WebDavClientException: Response status code does not indicate success: '403' ('Forbidden'). Message: <?xml version="1.0" encoding="UTF-8"?> <D:error xmlns:D="DAV:"/> at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<EnsureSuccessStatusCode>d__10.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.GetResult() at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequest>d__9.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequestAndReturnResponseHeaders>d__8.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at CalDavSynchronizer.DataAccess.CalDavDataAccess.<CreateNewEntity>d__27.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at CalDavSynchronizer.Implementation.CalDavRepository`1.<Create>d__17.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at GenSync.EntityRepositories.BatchEntityRepositoryAdapter`4.<PerformOperations>d__3.MoveNext() ``` How can I understand the root cause of this issue? I have attached a sample event that generate the exception. [Quest.zip](https://github.com/aluxnimm/outlookcaldavsynchronizer/files/6879244/Quest.zip)

kerem commented

2026-02-25 20:31:23 +03:00

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@filippobottega commented on GitHub (Jul 26, 2021):

Errors are transient. When I retry sync I get different errors and after some times I'm able to sync all events. Is it possibile to automatically retry sync in case of errors?

@filippobottega commented on GitHub (Jul 26, 2021): Errors are transient. When I retry sync I get different errors and after some times I'm able to sync all events. Is it possibile to automatically retry sync in case of errors?

kerem commented

2026-02-25 20:31:23 +03:00

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Owner

@felipelrz commented on GitHub (Dec 11, 2021):

Please check this thread for a possible solution.

@felipelrz commented on GitHub (Dec 11, 2021): Please check [this thread](https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/333#issuecomment-991658861) for a possible solution.