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Exchange Online Reduces Delicensing Resiliency Threshold to 5,000 Mailboxes
A July 15 announcement says that Exchange Online is reducing the Delicensing Resiliency threshold from 10,000 to 5,000 mailboxes. That’s fine, but this feature should be available for all Exchange Online tenants. It’s a sticking plaster for how group-based licensing works and is inconsistent with how OneDrive for Business deals with unlicensed personal user data. https://office365itpros.com/2025/07/16/delicensing-resiliency-5000/
HELP: can't login client computer, exchange server 2016
So I need to setup an exhange mail server for a school task. I need to be able to login on a windows client with an exchange account. I did everything right, installed the exchange server and connected the windows client to my domain "sendit.be". But am not able to login on my exchange account on my windows client (see screenshots) I hope someone can help me. Thank you in advance!
Certificate Binding Issue Detected: '' Doesn't exist on the
Hi after the Exchane update in March, the EAC and OWA website crashed - white screen. I found out that the test was a problem with certificates. wII I set the appropriate certificates but the problem still exists in the healthcheck tests I still have ibnfo about a problem with the certificate, but they are not there?? Default Web Site Started False http - *:80: - NULL http - 127.0.0.1:80: - NULL https - 127.0.0.1:443: - CE1F23873453D9F733AD24D7DA7BBD83C275CDB4 https - *:443: - CE1F23873453D9F733AD24D7DA7BBD83C275CDB4 Exchange Back End Started False http - *:81: - NULL https - *:444: - CE1F23873453D9F733AD24D7DA7BBD83C275CDB4 Certificate Binding Issue Detected: 'CE1F23873453D9F733AD24D7DA7BBD83C275CDB4' Doesn't exist on the server and this will cause problems. Certificate Binding Issue Detected: 'CE1F23873453D9F733AD24D7DA7BBD83C275CDB4' Doesn't exist on the server and this will cause problems. Certificate Binding Issue Detected: 'CE1F23873453D9F733AD24D7DA7BBD83C275CDB4' Doesn't exist on the server and this will cause problems.
Recurring booking issues // 'AutomateProcessing' enabled on delegate approval
Having issues with our 9 rooms just behaving terribly - bookings just do not sync between different users. Have tried wiping and rebuilding the permissions. Still having issues. Have tried using Exchange AC's built in 'Resource Booking' report - this actually does not show me any bookings for the last three days. Have tried using the AC's 'Calendar Logs' report, which gives me the following output for a specific booking. Things I notice: 1) a lot of 'Not Found' params and 'InvalidSchemaPropertyName' params. 2) The timestamps are all in UTC, despite us being AST. I'm not sure if either of these have anything to do with bookings not sync'ing between users or not. CoPilot has suggested they may be influencing things - and you'd think in that case you'd be able to edit them without powershell, but.. CoPilot pulls from Microsoft docs. . Below is the output from the 'Calendar Logs' report - I can't really make sense of it. This was originally made in the web client, then checked on Outlook - I'm not sure how these relate, or if there's even a way to check this? CleanGlobalObjectId OriginalLastModifiedTime CalendarLogRequestId CalendarLogTriggerAction CalendarProcessed ExternalSharingMasterId OriginalClientInfoString ClientInfoString ItemClass OriginalStartDate ItemVersion ParentDisplayName OriginalParentDisplayName AppointmentAuxiliaryFlags AppointmentRecurrenceBlob AppointmentLastSequenceNumber AppointmentRecurring AppointmentSequenceNumber AppointmentState CalendarOriginatorId CalendarItemType ChangeList ClientIntent CreationTime DisplayAttendeesAll DisplayAttendeesCc DisplayAttendeesTo EndTime EndTimeZone FreeBusyStatus From GlobalObjectId HijackedMeeting IsCopyOnWriteItem IsException IsMeeting IsRecurring IsResponseRequested IsAllDayEvent IsCancelled IsProcessed IsSoftDeleted ItemId LastModifiedTime Location MapiIsAllDayEvent ResponseType MeetingRequestType OriginalCreationTime ReceivedBy ReceivedRepresenting RecurrencePattern ResponseState ResponsibleUserName SenderEmailAddress SentRepresentingEmailAddress SentRepresentingDisplayName StartTime StartTimeZone SubjectProperty TimeZone TimeZoneBlob TimeZoneDefinitionEnd TimeZoneDefinitionRecurring TimeZoneDefinitionStart IsSeriesCancelled IsOrganizerProperty 040000008200E00074C5B7101A82E00800000000A83A46BDB4F4DB01000000000000000010000000A5E908D6D17BB44B9B66DF5493C5B457 7/14/25 11:45 a0a4dc98-5a84-3da9-8092-5e0b2929dd82 Create NotFound NotFound null Client=REST;;;Client=REST;InternalCalendarSharing (Client=OWA;Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36 Edg/138.0.0.0;)[AppId=1c06531d-b56d-4cfb-8ad0-53c87d70093e]; IPM.Appointment NotFound 1 Calendar Calendar NotFound NotFound NotFound FALSE 0 None null Single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one null NotFound NotFound NotFound ######## null Busy Whisper Room" <email address removed for privacy reasons>" 040000008200E00074C5B7101A82E00800000000A83A46BDB4F4DB01000000000000000010000000A5E908D6D17BB44B9B66DF5493C5B457 NotFound null FALSE FALSE FALSE TRUE FALSE FALSE NotFound NotFound null ######## FALSE Organizer NotFound null NotFound NotFound NotFound my user InvalidSchemaPropertyName InvalidSchemaPropertyName Whisper Room 7/14/25 23:30 null Nayan (UTC-04:00) Atlantic Time (Canada) null null null null NotFound TRUE 040000008200E00074C5B7101A82E00800000000FA708467B8F4DB01000000000000000010000000F867D9C874F9174F934BDB74C4FBE325 7/14/25 12:11 60d5d7fc-a7ec-ae24-d03d-22ff648dcf18 Create NotFound NotFound null Client=REST;;;Client=REST;InternalCalendarSharing (Client=OWA;Action=ViaProxy)[AppId=1c06531d-b56d-4cfb-8ad0-53c87d70093e]; IPM.Appointment NotFound 1 Calendar Calendar NotFound NotFound NotFound FALSE 0 None null Single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one null NotFound NotFound NotFound ######## null Busy Whisper Room" <email address removed for privacy reasons>" 040000008200E00074C5B7101A82E00800000000FA708467B8F4DB01000000000000000010000000F867D9C874F9174F934BDB74C4FBE325 NotFound null FALSE FALSE FALSE TRUE FALSE FALSE NotFound NotFound null ######## FALSE Organizer NotFound null NotFound NotFound NotFound my user InvalidSchemaPropertyName InvalidSchemaPropertyName Whisper Room 7/14/25 11:30 null Nayan (UTC-04:00) Atlantic Time (Canada) null null null null NotFound TRUE sorry for the format - it wouldn't let me post it any other way. The spreadsheet is attached tho I've used the following cmdlets in PowerShell to dig into this issue - Get-CalendarProcessing, Get-MailboxFolderPermissions, Get-MailboxRegionalConfig. These are setup with 2 delegate editors (as in, people who approve/decline meeting invites) and 6 editors (people who can book without needing approval, and do not have the Delegate flag. All 8 have SendAs permission, so bookings dont just show under their name.. Weirdly, these rooms look to have AutomateProcessing set to AutoAccept, despite very clearly being configured not to do this in EAC. THIS article of course does not mention the AutomateProcessing param except for in 3 examples - one of which is a delegation scenario where logically, automate processing would be off. I have enough experience to know not to trust an official microsoft KB. PS C:\Users\me> get-CalendarProcessing -identity "whisperroom" | fl AutomateProcessing : AutoAccept <<<<<<<<<<<<<< what? AllowConflicts : False AllowDistributionGroup : True AllowMultipleResources : True BookingType : Standard BookingWindowInDays : 180 MaximumDurationInMinutes : 1440 MinimumDurationInMinutes : 0 AllowRecurringMeetings : True EnforceAdjacencyAsOverlap : False EnforceCapacity : False EnforceSchedulingHorizon : True ScheduleOnlyDuringWorkHours : False ConflictPercentageAllowed : 0 MaximumConflictInstances : 0 ForwardRequestsToDelegates : True DeleteAttachments : True DeleteComments : True RemovePrivateProperty : True DeleteSubject : True AddOrganizerToSubject : True DeleteNonCalendarItems : True TentativePendingApproval : True EnableResponseDetails : True OrganizerInfo : True ResourceDelegates : {delegates - the 2 users with SharingPermissionFlag:Delegate} RequestOutOfPolicy : {} AllRequestOutOfPolicy : False BookInPolicy : {} AllBookInPolicy : False RequestInPolicy : {} AllRequestInPolicy : True AddAdditionalResponse : False AdditionalResponse : RemoveOldMeetingMessages : True AddNewRequestsTentatively : True ProcessExternalMeetingMessages : False RemoveForwardedMeetingNotifications : False AutoRSVPConfiguration : Microsoft.Exchange.Data.Storage.AutoRSV PConfiguration RemoveCanceledMeetings : False EnableAutoRelease : False PostReservationMaxClaimTimeInMinutes : 10 DnToOidMappings : {} MailboxOwnerId : Whisper Room Identity : Whisper Room IsValid : True ObjectState : Changed I'm getting really frustrated by the incoherence between backend and frontend configuration, no actual dev-written documentation, and that there's 5-6 different cmdlets that affect calendar processing, and they aren't just all under 'Get-CalendarProcessing' . I DO have mailbox auditing enabled for these resources, I'm just reluctant to add MORE logs into the mix, when all the current ones have done is make things less clear. Would love some helpExchange Mailbox copy Databases Keep Disconnect
Hello, Since June 26th, PRTG has been notifying me about the disconnection of the copy databases on the secondary Exchange server. Each time, I receive an alert about one of the copy databases hosted on the secondary Exchange server, and it comes back online in less than 5 minutes. Everything is working fine on the primary Exchange server, and the mounted databases on the secondary server are also functioning properly. Only the copy databases on the secondary Exchange server keep disconnecting and go back online in less than 5 minutes.Certificate Binding
how fix error- healthchceker test write: Certificate Binding Issue Detected: 'CE1F23873453D9F733AD24D7DA7BBD83C275CDB4' Doesn't exist on the server and this will cause problems. the website shows a message about an invalid certificate (it is valid for a certain period of time), after clicking I understand that there is a risk, a blank screen remainsCannot connect to an on prem 2019 Exchange mailbox
Hi, I am having all weird issues trying to get my home laptop to configure an Outlook (M365 apps) account to connect to our work on prem Exchange. It times out as if it can't talk to the Exchange server. I created a new computer profile then tried, it actually worked, I could see my mailbox, send and receive email. Later I deleted the profile, tried again in the same local computer profile, it failed with the same behavior as above. When I do an 'nslookup austodiscover.mydomain.com.au' it resolves correctly to WAN IP where our server is located behind. Other people have no issue connecting externally, so there's nothing wrong with the firewall or server communicating with external Outlook clients. My work computer connects fine on the LAN. I brought my home laptop into the LAN, it still doesn't work. DNS issue right? Well, as mentioned, the autodiscover nslookup works and I don't have any other weird DNS related issues. There's just something really flaky going on with my computer.
