我正在使用Office 365 DLL将我的应用程序与Office 365日历集成。 一切正常，直到昨天，从早上开始停止工作，我没有更改任何代码或设置。
我得到的例外是
Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 : 6/21/2016 5:56:50 AM: - TokenCache: Deserialized 3 items to token cache.
Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 : 6/21/2016 5:56:54 AM: - TokenCache: Deserialized 3 items to token cache.
Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 : 6/21/2016 5:56:54 AM: - AuthenticationContext: ADAL .NET with assembly version '2.23.0.0', file version '2.23.30226.1847' and informational version '0b5f258db72d0632d3693d262acbf77b634e9136' is running...
Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 : 6/21/2016 5:56:54 AM: 27e2cb5e-d44a-4XX0-bXX6-388XXXXXXXXd7 - AcquireTokenHandlerBase: === Token Acquisition started:
Authority: https://login.microsoftonline.com/1XXXXd7f-0c29-4XX9-9XX4-f13825XXXX46/
Resource: https://api.office.com/discovery/
ClientId: 6fXXXX63-6XX9-4XX4-9XX9-0eXXXXf1a629
CacheType: Office365TokenCacheBL (3 items)
Authentication Target: UserPlusClient
Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 : 6/21/2016 5:56:56 AM: - TokenCache: Deserialized 3 items to token cache.
Microsoft.IdentityModel.Clients.ActiveDirectory Verbose: 1 : 6/21/2016 5:56:56 AM: 27XXXX5e-dXXa-4XX0-bXX6-38XXXX2d9ad7 - TokenCache: Looking up cache for a token...
Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 : 6/21/2016 5:56:56 AM: 27XXXX5e-dXXa-4XX0-bXX6-388XXXX9ad7 - TokenCache: An item matching the requested resource was found in the cache
Microsoft.IdentityModel.Clients.ActiveDirectory Verbose: 1 : 6/21/2016 5:56:56 AM: 27XXXX5e-dXXa-4XX0-bXX6-38XXXX2d9ad7 - TokenCache: 52.1731331333333 minutes left until token in cache expires
Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 : 6/21/2016 5:56:56 AM: 27XXXX5e-dXXa-4XX0-bXX6-38XXXX2d9ad7 - TokenCache: A matching item (access token or refresh token or both) was found in the cache
Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 : 6/21/2016 5:56:56 AM: 27XXXX5e-dXXa-4XX0-bXX6-38XXXX2d9ad7 - AcquireTokenHandlerBase: === Token Acquisition finished successfully. An access token was retuned:
Access Token Hash: mU0K9hd7I9oZs2xNXXXXXXXVTyQY6IoBc636dUAIH0=
Refresh Token Hash: 1pq0a2MeN/pMOn0VXXXXXXX2APDqUIDgIaEOcjJWp8=
Expiration Time: 6/21/2016 6:49:06 AM +00:00
User Hash: LEIVCDzkEaYHwWq9kXXXXXXg0SHrVOQs4EELpUPBLaE=
Microsoft.IdentityModel.Clients.ActiveDirectory Error: 4 : 6/21/2016 5:58:02 AM: dde01a1c-75a3-4511-8bfa-bccc4193b06a - <<CreateOffice365Service>b__1>d__14: Microsoft.Office365.Discovery.DiscoveryFailedException: Exception of type 'Microsoft.Office365.Discovery.DiscoveryFailedException' was thrown.
at Microsoft.Office365.Discovery.DiscoveryClient.<DiscoverServicesAsync>d__4.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 Microsoft.Office365.Discovery.DiscoveryClient.<DiscoverCapabilitiesAsync>d__14.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 Microsoft.Office365.Discovery.DiscoveryClient.<DiscoverCapabilityAsync>d__1a.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 Office365CalendarProviderBL.<>c__DisplayClass4.<<CreateOffice365Service>b__1>d__14.MoveNext() in d:\path.cs line no.-x
请建议我在代码中查找问题的位置或此处需要的其他内容