Client:
Windows 7 SP1 x64
Office 2010 SP1 x86 + June 2013 CU.
Exchange 2010 (14.2.342.4001).
Problem:
Multiple times a minute, outlook is is logging Calendar Folder property is missing in the Application event log. Example
Log Name: Application
Source: Outlook
Date: 6/19/2013 1:27:36 PM
Event ID: 27
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer: MYPC.MYDOMAIN
Description:
Calendar Folder property is missing
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Outlook" />
<EventID Qualifiers="16384">27</EventID>
<Level>3</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2013-06-19T20:27:36.000000000Z" />
<EventRecordID>70655</EventRecordID>
<Channel>Application</Channel>
<Computer>MYPC.MYDOMAIN</Computer>
<Security />
</System>
<EventData>
<Data>Calendar Folder property is missing</Data>
</EventData>
</Event>
Possibly related, I notice in the Exchange Sync Issues folder, the following is also being logged frequently.
14:28:46 Synchronizer Version 14.0.7101 14:28:46 Synchronizing Mailbox 'LAST, FIRST' 14:28:46 Synchronizing local changes in folder 'Outbox' 14:28:46 Uploading to server 'outlook.MYDOMAIN' 14:28:46 Synchronization of some deletions failed. 14:28:46 [80004005-501-4B9-130] 14:28:46 The client operation failed. 14:28:46 Microsoft Exchange Information Store 14:28:46 For more information on this failure, click the URL below: 14:28:46 http://www.microsoft.com/support/prodredirect/outlook2000_us.asp?err=80004005-501-4b9-130 14:28:46 1 item(s) deleted in online folder 14:28:46 Done
Yes, I’m aware of http://support.microsoft.com/kb/2606009 which doesn’t offer a resolution. The Exchange admin doesnt seem concerned with either of these errors to troubleshoot further.
As far as I can tell, my Exchange Calendar is working properly. No missing meetings, notifications, can browse others calendars, people can schedule meetings with mine, etc.
Any way to find out exactly what Outlook is unhappy about?
This problem is fixed in Description of the Outlook 2010 hotfix package (Outlook-x-none.msp): December 10, 2013
After installing Office 2010 SP2 (or an earlier update), Outlook 2010 users started noticing Event ID 27, «Calendar Folder property is missing» warnings in the Event viewer’s Application log. While annoying, it’s not harmful and should only be generated when Outlook is first started, one event for each calendar in the profile.

Microsoft discovered this warning is triggered for users who have a PST in their profile, including PSTs that were created by connecting to a SharePoint site, subscribing to Internet Calendars, as well as used by POP3 and IMAP accounts and AutoArchive.
Microsoft’s workaround? Remove the PST files. Seriously.
From KB2883156 Event ID 27, «Calendar Folder property is missing,» after you apply Office 2010 SP2
To work around this problem, PSTs can be removed from the profile. To remove PSTs from your Outlook profile, follow these steps:
1. Open Microsoft Outlook 2010.
2. Click File, and then click Account Settings.
3. Click the Data Files tab.
4. Select the data file that you want to remove, and then click Remove.Removing PSTs from your profile will not remove the PSTs from your system. Removing some PSTs may result in loss of functionality in Outlook. For example, removing the SharePoint Lists PST will remove connections to SharePoint sites.
«Removing some PSTs may result in loss of functionality in Outlook.» «may» reduce functionality? I think removing any PST from a profile is highly likely to reduce functionality in Outlook, especially if it belongs to a POP3 or IMAP account.
Personally, I’ll live with the annoying events and keep my SharePoint connections, while I wait for a real fix. It’s easy enough to create a filter in the event log that hides Event 27 and they’ll age off.
To create a filter, open the Event viewer and right-click on Application log and choose Filter Current Log.

Type -27 in the Includes/Excludes field in the middle of the dialog and click Ok. This will hide Event 27 but show all other events.
After applying Office 2010 Service Pack 2 or one of the last updates that were released for Service Pack 1 (KB2817371 or later), you may see the following warning popping up multiple times in the Application Log of the Event Viewer:
Source: Outlook
EventID: 27
Description: Calendar Folder Property is missing
Office 2010 Service Pack 2 is safe to use
While it might seem scary to suddenly have that many warning events, investigation by the Outlook Team shows that there is no actual harm done to the system and the issue is basically “purely cosmetic”.
This means that there isn’t any direct need to uninstall SP2 and proceeding deployment of SP2 is fully supported.
Update:
A fix for this issue will be part of the December 2013 update for Outlook 2010 (released on December 10 to be precise).
The KB article for this issue is: KB2883156: Event ID 27, “Calendar Folder property is missing,” after you apply Office 2010 SP2.
There is also a quite vocal thread with additional information about this issue in the Outlook IT Pro TechNet forum.
Solutions and alternatives
A warning event is logged upon starting Outlook for each Calendar that you have when you have a pst-file attached to your mail profile.
Currently, the proposed solution in the KB article is to remove any pst-files from your mail profile.
While this may be a viable solution when you only have an Exchange account or Outlook Hotmail Connector account configured in your mail profile, it certainly isn’t possible to do this when you have a POP3 or IMAP account configured in Outlook or are also connected to a SharePoint Server or Web Calendars.
As mentioned previously, the warnings can be safely ignored. However, if you want them out of your Event Viewer, you can hide them by applying a filter.
- Use the “Filter Current Log…” link in the Actions pane of the Event Viewer or from the right click menu on “Application” under Windows Logs.
- Specify the following:
- Event level: Warning
- Event sources: Outlook
- Includes/Excludes Event IDs: -27

To set the exclude filter, don’t forget the minus ( – ) in front of 27.
(Click on image to enlarge)
Note:
Don’t worry about your Event Log or hard disk filling up: By default, the Application log will only grow up to 20MB and will automatically purge older items when this size has been reached.
In praxis this means that it can keep over 25.000 events which, for the average system, is almost a year back. The amount of items logged by this Outlook bug is hardly affecting that.
Client:
Windows 7 SP1 x64
Office 2010 SP1 x86 + June 2013 CU.
Exchange 2010 (14.2.342.4001).
Problem:
Multiple times a minute, outlook is is logging Calendar Folder property is missing in the Application event log. Example
Log Name: Application
Source: Outlook
Date: 6/19/2013 1:27:36 PM
Event ID: 27
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer: MYPC.MYDOMAIN
Description:
Calendar Folder property is missing
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Outlook" />
<EventID Qualifiers="16384">27</EventID>
<Level>3</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2013-06-19T20:27:36.000000000Z" />
<EventRecordID>70655</EventRecordID>
<Channel>Application</Channel>
<Computer>MYPC.MYDOMAIN</Computer>
<Security />
</System>
<EventData>
<Data>Calendar Folder property is missing</Data>
</EventData>
</Event>
Possibly related, I notice in the Exchange Sync Issues folder, the following is also being logged frequently.
14:28:46 Synchronizer Version 14.0.7101 14:28:46 Synchronizing Mailbox 'LAST, FIRST' 14:28:46 Synchronizing local changes in folder 'Outbox' 14:28:46 Uploading to server 'outlook.MYDOMAIN' 14:28:46 Synchronization of some deletions failed. 14:28:46 [80004005-501-4B9-130] 14:28:46 The client operation failed. 14:28:46 Microsoft Exchange Information Store 14:28:46 For more information on this failure, click the URL below: 14:28:46 http://www.microsoft.com/support/prodredirect/outlook2000_us.asp?err=80004005-501-4b9-130 14:28:46 1 item(s) deleted in online folder 14:28:46 Done
Yes, I’m aware of http://support.microsoft.com/kb/2606009 which doesn’t offer a resolution. The Exchange admin doesnt seem concerned with either of these errors to troubleshoot further.
As far as I can tell, my Exchange Calendar is working properly. No missing meetings, notifications, can browse others calendars, people can schedule meetings with mine, etc.
Any way to find out exactly what Outlook is unhappy about?
Client:
Windows 7 SP1 x64
Office 2010 SP1 x86 + June 2013 CU.
Exchange 2010 (14.2.342.4001).
Problem:
Multiple times a minute, outlook is is logging Calendar Folder property is missing in the Application event log. Example
Log Name: Application
Source: Outlook
Date: 6/19/2013 1:27:36 PM
Event ID: 27
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer: MYPC.MYDOMAIN
Description:
Calendar Folder property is missing
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Outlook" />
<EventID Qualifiers="16384">27</EventID>
<Level>3</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2013-06-19T20:27:36.000000000Z" />
<EventRecordID>70655</EventRecordID>
<Channel>Application</Channel>
<Computer>MYPC.MYDOMAIN</Computer>
<Security />
</System>
<EventData>
<Data>Calendar Folder property is missing</Data>
</EventData>
</Event>
Possibly related, I notice in the Exchange Sync Issues folder, the following is also being logged frequently.
14:28:46 Synchronizer Version 14.0.7101 14:28:46 Synchronizing Mailbox 'LAST, FIRST' 14:28:46 Synchronizing local changes in folder 'Outbox' 14:28:46 Uploading to server 'outlook.MYDOMAIN' 14:28:46 Synchronization of some deletions failed. 14:28:46 [80004005-501-4B9-130] 14:28:46 The client operation failed. 14:28:46 Microsoft Exchange Information Store 14:28:46 For more information on this failure, click the URL below: 14:28:46 http://www.microsoft.com/support/prodredirect/outlook2000_us.asp?err=80004005-501-4b9-130 14:28:46 1 item(s) deleted in online folder 14:28:46 Done
Yes, I’m aware of http://support.microsoft.com/kb/2606009 which doesn’t offer a resolution. The Exchange admin doesnt seem concerned with either of these errors to troubleshoot further.
As far as I can tell, my Exchange Calendar is working properly. No missing meetings, notifications, can browse others calendars, people can schedule meetings with mine, etc.
Any way to find out exactly what Outlook is unhappy about?
Но именно так я собираюсь стать важным аргументом в покупке. Если тогда заплаченный 1,99 Euro может быть дальнейшим развитием неэкономичным, может быть, был значительно больше, чем приложение MS Calendar. По крайней мере, я ожидал мнения, программист / поставщик до сих пор не ответил. По-видимому, нет интереса, мобильный был тогда червем.
Диапазон, в котором встречи отображаются до и после «Сегодня». Если я активирую соответствующую функцию, стартовое окно WP 8.1, установленное и успешно используемое, на короткое время мигает. Мне также пришлось бы снова заплатить, чтобы найти другое приложение-календарь. Ну так гляди, может еще и настройки моего L640 ?? !!
И календарь человека Chronos (с и без +).
если и как это продолжается сейчас. Оба были для вас, так что рабочая версия W10M снова была продана в магазине. К сожалению, мои запросы могут копировать / дублировать встречи.
Я говорю об альтернативном календаре True Calendar 8, который был представлен здесь, на форуме 2014 (?). После перехода на Windows 10, потому что считаю, что приложение хорошее. Возможно, это просто мелочь, чтобы приспособить измененное приложение для W10M. Начиная с версии 1.4.8.1 в журнале изменений говорится, что Windows 10 исправляет календарь Outlook, а затем экран остается черным.
Я поставил календарь в это время, копируя / вы … Подробнее …
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Cannot retrieve contributors at this time
| title | description | author | ms.author | manager | audience | ms.topic | localization_priority | ms.custom | ms.reviewer | appliesto | search.appverid | ms.date | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Event ID 27 and Calendar Folder property is missing error |
Describes an issue in which some users will see lots of instances of Event ID 27 in the Application log. |
helenclu |
luche |
dcscontentpm |
ITPro |
troubleshooting |
Normal |
|
abarglo, gbratton, aruiz |
Microsoft Outlook 2010 |
MET150 |
3/31/2022 |
Event ID 27 and Calendar Folder property is missing error occurs after you apply Office 2010 SP2
Original KB number: 2883156
Summary
After you apply Microsoft Office 2010 Service Pack 2 (SP2) or hotfixes released after SP2, users may see many Event ID 27 warnings from Outlook in the Application log. This issue occurs for users who have a PST attached to their profile. This includes PSTs that were created by connecting to a Microsoft SharePoint site.
The following is an example event in the Application log:
Log Name: Application
Source: Outlook
Date: DateTime
EventID: 27
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer: ComputerName
Description:
Calendar Folder Property is missing
Workaround
To work around this problem, PSTs can be removed from the profile. To remove PSTs from your Outlook profile, follow these steps:
- Open Microsoft Outlook 2010.
- Select File, and then select Account Settings.
- Select the Data Files tab.
- Select the data file that you want to remove, and then select Remove.
Removing PSTs from your profile will not remove the PSTs from your system. Removing some PSTs may result in loss of functionality in Outlook. For example, removing the SharePoint Lists PST will remove connections to SharePoint sites.