Recurring resource booking fails in Exchange 2007, error 8206 EXCDO
Hi, we cannot create recurring meetings with (overbookable) resources if there is a conflict (actually not even a conflict as we allow this, it's just an existing event at the same time), even though we explicitely allow conflicts for this resource. I don't know if there is a misconfiguration on the resource but the 8026 error let's me think that this is not the case. The basic idea is having an absence calendar, if you are out of the office you just invite this resource. Here are the resource's calendarsettings: -------------------------------------------------------------------------------- [PS] C:\>Get-MailboxCalendarSettings absence|fl AutomateProcessing : AutoAcceptAllowConflicts : TrueBookingWindowInDays : 720MaximumDurationInMinutes : 0AllowRecurringMeetings : TrueEnforceSchedulingHorizon : TrueScheduleOnlyDuringWorkHours : FalseConflictPercentageAllowed : 99MaximumConflictInstances : 99ForwardRequestsToDelegates : TrueDeleteAttachments : TrueDeleteComments : TrueRemovePrivateProperty : TrueDeleteSubject : FalseDisableReminders : TrueAddOrganizerToSubject : TrueDeleteNonCalendarItems : TrueTentativePendingApproval : TrueEnableResponseDetails : TrueOrganizerInfo : TrueResourceDelegates : {Joe Blou}RequestOutOfPolicy :AllRequestOutOfPolicy : FalseBookInPolicy :AllBookInPolicy : TrueRequestInPolicy :AllRequestInPolicy : FalseAddAdditionalResponse : FalseAdditionalResponse : <DIV><FONT face=Tahoma size=2></FONT></DI V>RemoveOldMeetingMessages : TrueAddNewRequestsTentatively : TrueProcessExternalMeetingMessages : FalseDefaultReminderTime : 15RemoveForwardedMeetingNotifications : False -------------------------------------------------------------------------------- When I create a recurring (and only a recurring) meeting with a conflict I get two emails, first a booking confirmation -------------------------------------------------------------------------------- Your request was accepted. Your request was accepted through 7/28/2008. However, the following instances conflict: Organizer and Time of Conflicting Meeting JoeCool-7/14/2008 12:00:00 AM to 7/19/2008 12:00:00 AM -------------------------------------------------------------------------------- and shortly afterwards I get a declined message -------------------------------------------------------------------------------- This instance was declined because there are conflicts. The conflicts are: Organizer and Time of Conflicting Meeting Joe Cool-7/14/2008 12:00:00 AM to 7/19/2008 12:00:00 AM -------------------------------------------------------------------------------- and the meeting disappears from the resource's schedule. On the Exchange server we get an error 8206, EXCDO with "Calendaring agent failed with error code 0x8004010f while saving appointment. " The error data reads 0000: 48 72 53 61 76 69 6e 67 HrSaving0008: 41 70 70 74 3a 3a 48 72 Appt::Hr0010: 43 68 65 63 6b 50 61 74 CheckPat0018: 74 65 72 6e 20 66 61 69 tern fai0020: 6c 65 64 2e 20 4d 61 69 led. Maisnip Our Exchange Std 2007 server is on SP1 RU3 but this also happened with vanilla SP1. Clients are Outlook 2007 and OWA. Has anyone seen this before? Or does anyone even have a solution? Thanks
July 16th, 2008 3:28pm

Hi, What happens if you remove the delegate? Leif
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July 16th, 2008 5:30pm

Hi, I removed the delegate with Set-MailboxCalendarSettings absence -resourcedelegatesnull but no change, the meeting cannot be made and the 8206 error occurs in the server's eventlog. Thanks
July 16th, 2008 9:54pm

Try removing theConflictPercentageAllowed setting and keeping the MaximumConflictInstances setting. Let us know if this helps. Jeremy I found this info at: http://knicksmith.blogspot.com/2007_05_01_archive.html Resource Calendar Options In additions to the features offered by the resource booking attendant there are many other calendar customizations that can be defined. Below are a few useful options that we use all the time. A complete list can be found at http://technet.microsoft.com/en-us/library/aa996340.aspx. -AddAdditionalResonse and AdditionalResponse Define an additional response text that will accompany any meeting accept/decline/tentative notices. -AddOrganizerToSubject If set to $True, the calendar attendant will prepend the meeting organizers name to the meeting subject. This is very useful for quickly identifying the meeting organizer while looking at the resource calendar. -AddRequestsTenatively If set to $true, all meeting requests will be added to the resource calendar and marked as tentative until acted upon by a resource delegate. -DeleteAttachments If set to $true, attachments will be removed from the meeting information in the resource mailbox. -DeleteComments, -DeleteSubject See above. -DeleteNonCalendarItems If set to $true any non-calendar related messages will be deleted. -BookingWindowInDays Defines a horizon date for meeting scheduling. Also see EnforceSchedulingHorizon. -ConflictPercentageAllowed If recurring meetings are enabled you can define a conflict percentage to avoid declining a series of meetings because of a single conflict. An allowed percentage of 25 would allow a meeting with 8 occurrences to be accepted as long as no more than 2 conflicts were detected. A separate decline message would be sent to the organizer for the conflicting meeting times. -MaximumConflictInstances The same as ConflictPercentageAllowed except with a defined static amount of conflicts allowed. -MaximumDurationInMinutes If you wish to prevent people from scheduling resources for a day, or possibly a few days, you can define this setting to set the maximum meeting duration. Alternatively, if you set the value to 0 meetings of any length will be processed. -ProcessExternalMeetingMessages If set to $true, meeting requests from external Exchange organizations will be processed.
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July 16th, 2008 10:02pm

I ran Set-MailboxCalendarSettings -identity it-absence -ConflictPercentageAllowedfalse (it's actually dollar false ; how can I get rid of this smiley???) No change, the meeting gets accepted and declined at the same time and 8206 on the server. The settings now look like [PS] C:\>Get-MailboxCalendarSettings absence|fl AutomateProcessing : AutoAcceptAllowConflicts : TrueBookingWindowInDays : 720MaximumDurationInMinutes : 0AllowRecurringMeetings : TrueEnforceSchedulingHorizon : TrueScheduleOnlyDuringWorkHours : FalseConflictPercentageAllowed : 0MaximumConflictInstances : 99ForwardRequestsToDelegates : TrueDeleteAttachments : TrueDeleteComments : TrueRemovePrivateProperty : TrueDeleteSubject : FalseDisableReminders : TrueAddOrganizerToSubject : TrueDeleteNonCalendarItems : TrueTentativePendingApproval : TrueEnableResponseDetails : TrueOrganizerInfo : TrueResourceDelegates : {}RequestOutOfPolicy :AllRequestOutOfPolicy : FalseBookInPolicy :AllBookInPolicy : TrueRequestInPolicy :AllRequestInPolicy : FalseAddAdditionalResponse : FalseAdditionalResponse : <DIV><FONT face=Tahoma size=2></FONT></DI V>RemoveOldMeetingMessages : TrueAddNewRequestsTentatively : TrueProcessExternalMeetingMessages : FalseDefaultReminderTime : 15RemoveForwardedMeetingNotifications : False Thanks
July 16th, 2008 10:07pm

Is the default for ConflictPercentage 0 or NULL? You may need to set it to NULL (not typed 'NULL' but left blank), or enter a setting that makes sense. Try 25, like the other BLOG utlilized. Jeremy
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July 16th, 2008 10:14pm

I also tried using "0" but it should make no difference anyway. If I understand this correctly a meeting will be declined when more than ConflictPercentageof the meetings have a conflict. For an absence resource you can be sure that there will always be conflicts. One the one hand it seems to work fine, the resource accepts the meeting in the first place. I guess it then encounters this 8206 and then declines the meeting afterwards. In case it helps, if I look at the resource's schedule while creating the meeting I can see that the meeting first shows up tentatively, then accepted and then vanished again, all this takes two seconds or so. I also get the accepted email first, the declined comes a little later. Thanks
July 16th, 2008 10:23pm

One more possible, although this is on Ex2003: Event ID: 8206 occurs when a MAPI-based application modifies calendar items in Exchange 2003 http://support.microsoft.com/kb/943721 I got it from this article which describes the issue closer to your issue/setup: http://www.diditbetter.com/A2E_Bulletins.aspx?mid=550&ctl=ArticleView&articleId=100 Jeremy
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July 16th, 2008 10:32pm

I stumbled across this before but it doesn't really help as the solution is to install the hotfix, and that's for 2003. I haven't seen such a hotfix for 2007 though. Thanks
July 16th, 2008 10:36pm

Hi, 8206 Errors are only self-corrective events,if there is a problem saving a recurring appointment, this event is logged, but Exchange store automatically fixes this problem. So, it is expected, that we might see this event logged for different users. But these events can be safely ignored. Besides, refer to KB 943371,please apply the latest update for Exchange 2007 with sp1. Event IDs 8206, 8213, and 8199 are logged in an Exchange Server 2007 environment http://support.microsoft.com/?id=943371 Hope it helps. Xiu
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July 18th, 2008 10:00am

Hi, thanks for your response. This article does not 100% apply to our problem as this error also occurs when making only two occurences, not 1300+. And, as I said in my initial post, we are on SP1 Rollup 3 which should include Rollup 1 as suggested in the KB article. Thanks
July 18th, 2008 10:10am

Base on my research,it is not a error, just a self-corrective events,you can just ignore it.
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July 18th, 2008 10:35am

I wouldhappily ignorethe error if everything else worked. Unfortunately the symptom persists, meaning that recurring meetings get removed from the resource's calendar. All I want is creating recurring meetings with resources and I want the meetings to be in the resource's calendar, this is not the case at present. Thanks
July 18th, 2008 10:42am

Did you ever find a resolution to this problem? We are experiencing the same frustrating problem that is driving our users (and IT support) crazy! Allow conflicts and allow recurring do not seem to play nice together. Recurring bookings appear to totally ignore the "allow conflicts" setting. Dana
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August 5th, 2008 11:47pm

Dana Aldom wrote: Did you ever find a resolution to this problem? We are experiencing the same frustrating problem that is driving our users (and IT support) crazy! Allow conflicts and allow recurring do not seem to play nice together. Recurring bookings appear to totally ignore the "allow conflicts" setting. Dana No, unfortunately the problem persists. At least we are not alone any more Thanks
August 6th, 2008 8:57am

Hi,We are experiencing the same problem with a resource calendar. We don't get the error, but we don't get the behavior we need. We want our resource calendar to do all the automated processing and we want it to allow conflicts for all appointments, recurring or not.What we have found is Exchange Server 2007 does not work properly at all for recurring appointment conflict resolution. The best we have found is the following:Allow up to this number of individual conflicts: 100Allow up to this percentage of individual conflicts: 100This does keep the schedule on the resource calendar as tentative, but the huge downside is Exchange sends a declined message for every recurring time back to the organizer. Totally unacceptable.We want the resource mailbox to just allow all recurring meetings no matter what. And to just send an accepted message back to the organizer. It seems to me that the percentage should handle this. Wouldn't 100% allowing of individual conflicts mean allow all conflicts?I don't understand why this isn't doable.All help is appreciated.Tyler
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August 7th, 2008 2:41am

I currently have a support case open with Microsoft and will post an update once we get an answer. I don't believe this is a configuration issue, but rather an "undocumented feature". Dana
August 7th, 2008 2:46am

I just got the official word back from Microsoft support. They have been able to reproduce this problem, but they claim that it is by design and as such no fix or workaround is available. I disagreed based on the fact that this is not the way that direct booking works nor does the logic make any sense, but they stuck to their guns and claim that they will send the request along to their enhancement team for consideration in future versions. Anyways, at least we know what we are dealing with now... Dana
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August 12th, 2008 6:48pm

Dana Aldom wrote: I just got the official word back from Microsoft support. They have been able to reproduce this problem, but they claim that it is by design and as such no fix or workaround is available. I disagreed based on the fact that this is not the way that direct booking works nor does the logic make any sense, but they stuck to their guns and claim that they will send the request along to their enhancement team for consideration in future versions. Anyways, at least we know what we are dealing with now... Dana What kinda answer is this? By design? Do they really claim that they introduced two parameters which are then being ignored by design? Sigh, if you can't fix it it must be by design. I'm really disappointed with that response. I feel like in the good old days when MS had the reputation of ignoring their customers wishes by design. Anyway, thanks for letting us know.
August 12th, 2008 10:11pm

I justsent an e-mail message to MS as well, hoping they will actually care. I hope more people keep pushing for a fix.I wish they had fixed this issue in Roll up 5, but unfortunately it is still the same.Just in case, EX2K7 SP1 Rollup5 is available here:http://www.microsoft.com/downloads/details.aspx?FamilyId=652ED33A-11A1-459C-8FFE-90B9CBFE7903&displaylang=enThanks!-sul.
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December 16th, 2008 12:56am

Did you ever find a resolution to this problem? Is Microsoft going to make the change? We are experiencing the same problem here.
March 23rd, 2009 10:38pm

Same issue here. SP1 Rollup 7. I'm calling PSS - this is a bug and I want to hear from them how it's not.
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May 15th, 2009 6:49pm

Did you get any joy from PSS? We are still dealing with this hoping that it gets resolved. Temporarily we were keeping the one resource that we need to allow conflicts and recurring meetings as a direct booking resource, but it seems that Outlook 2007 does not play well with this so we are up the creek again... sigh...Dana
June 12th, 2009 9:19pm

Well, I wouldn't say "joy" but they explained it... Those conflict settings (ConflictPercentageAllowed andMaximumConflictInstances)apply to rejecting or accpeting the recurring *series* as a whole. It will always reject the individual instance conflicts of recurring meetings irrespective of what AllowConflicts is set to. This is totally unclear in the documentation for those settings. And, according to PSS, this behavior may be adjusted in SP2 - there have been design changes filed on this. For now, your options for recurring meetings are manual delegation or writing a custom mailbox agent. Seehttp://msdn.microsoft.com/en-us/library/aa579185.aspxfor info on that.
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June 12th, 2009 9:51pm

Thanks Doug. fingers crossed for SP2...but not holding my breath....
June 12th, 2009 9:55pm

I am having the same issue and been trying to resolve it for a month... frustrating!Undocumented Feature, love that answer... or lack of.Is there a release date for SP2? Does anyone know if SP2 will actually fix this problem?
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June 24th, 2009 5:34pm

Since SP2 has been out for a little while now, can anyone confirm whether it fixes this issue?
December 3rd, 2009 7:25pm

Since SP2 has been out for a little while now, can anyone confirm whether it fixes this issue? Hi All, Have you guys got any remedy for this issue yet? I have the similar issue, but already have the SP2 since the installation. Any idea on the workaround? Thanks, K.Nagaraj
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January 19th, 2010 5:31pm

Ah, no we haven't upgraded yet so I'm sorry to hear that it's still there. I'm guessing your only recourse at this point for Exchange 2007 is coding a custom mailbox agent. 2010 may behave differently, but if not, you'll likely have to request a design change and hope they make it or again, code a custom mailbox agent.
January 22nd, 2010 2:47am

Hi Dong, Thanks, I hope so. However, it's troubling a lot to us without this facility. In fact, my BOSS has communicated to few BUs to provide this facility and back of me!!!:-( Anyway, thanks for your response!!! Regards, K.Nagaraj.
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January 22nd, 2010 3:59pm

Please check Exchange E-Mail Policy, do you recreate her? After restart Exchange start success?
January 23rd, 2010 3:05pm

Exchange 2007 SP3was released, is there a fix in SP3 for this? Has anyone upgraded to SP3 and can verify a possible fix?
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June 22nd, 2010 10:34pm

I have upgraded to SP3 and can verify that this still works as described above, where the series will be accepted but individual meetings will still be declined. I am disappointed that there is no option to configure universal acceptance for all meeting requests in a resource account regardless of conflict, recurrence, etc.
September 22nd, 2010 11:08am

Microsoft can't fix this issue with Exchange 2007 and they want to to move to Exchange 2010. I don't think so! Won't have this problem with Lotus Notes.,..maybe it time to reconcider Lotus Notes before deploying future Excvhnage upgrades.
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September 22nd, 2010 11:54am

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