Hi All, We have 2 users, i.e. Manager and Assistant. Manager grant the delegation to Assistant, in Outlook, he/she enable "My delegates only, but send a copy of meeting requests and responses to me (recommended)". Both Manager and Assistant's mailboxes are located in Database 1. However, when another user sends a meeting request to Manager, Manager recieves the meeting request, but Assistant does not. Even creating a new outlook profile, testing in another computer, cleaning all outlook rules, the problem persists. After Manager's mailbox is moved from Database 1 to Database 2, then another user sends a meeting request to Manager, both Manager and Assistant recieve the meeting request. Moving the Manager's mailbox back to Databse 1, the problem is appeared again. Any advise? Is there any setting of mailbox database we need to check? Here shows the mailbox calendar setting of Manager and Assistant [PS] C:\Windows\System32>get-mailbox -id manager| Get-MailboxCalendarSettings | fl AutomateProcessing : AutoUpdate AllowConflicts : False BookingWindowInDays : 180 MaximumDurationInMinutes : 1440 AllowRecurringMeetings : True EnforceSchedulingHorizon : True ScheduleOnlyDuringWorkHours : False ConflictPercentageAllowed : 0 MaximumConflictInstances : 0 ForwardRequestsToDelegates : True DeleteAttachments : True DeleteComments : True RemovePrivateProperty : True DeleteSubject : True DisableReminders : True AddOrganizerToSubject : True DeleteNonCalendarItems : True TentativePendingApproval : True EnableResponseDetails : True OrganizerInfo : True ResourceDelegates : {assistant} RequestOutOfPolicy : AllRequestOutOfPolicy : False BookInPolicy : AllBookInPolicy : True RequestInPolicy : AllRequestInPolicy : False AddAdditionalResponse : False AdditionalResponse : RemoveOldMeetingMessages : True AddNewRequestsTentatively : True ProcessExternalMeetingMessages : False DefaultReminderTime : 15 RemoveForwardedMeetingNotifications : False Identity : xxx.com/Users/manager [PS] C:\Windows\System32>get-mailbox -id assistant| Get-MailboxCalendarSettings | fl AutomateProcessing : AutoUpdate AllowConflicts : False BookingWindowInDays : 180 MaximumDurationInMinutes : 1440 AllowRecurringMeetings : True EnforceSchedulingHorizon : True ScheduleOnlyDuringWorkHours : False ConflictPercentageAllowed : 0 MaximumConflictInstances : 0 ForwardRequestsToDelegates : True DeleteAttachments : True DeleteComments : True RemovePrivateProperty : True DeleteSubject : True DisableReminders : True AddOrganizerToSubject : True DeleteNonCalendarItems : True TentativePendingApproval : True EnableResponseDetails : True OrganizerInfo : True ResourceDelegates : {} RequestOutOfPolicy : AllRequestOutOfPolicy : False BookInPolicy : AllBookInPolicy : True RequestInPolicy : AllRequestInPolicy : False AddAdditionalResponse : False AdditionalResponse : RemoveOldMeetingMessages : True AddNewRequestsTentatively : True ProcessExternalMeetingMessages : False DefaultReminderTime : 15 RemoveForwardedMeetingNotifications : False Identity : xxx.com/Users/assistant

Initiate logging and check for event, ( Further check in AD)

Hi, I suggest you check the integrity of the database, like IsInteg command. Thanks AllenAllen Song