Outlook Search Folder for External Senders
I'm using the Outlook M365 desktop app on the current channel and Exchnage 2019 in Hybrid mode with Exchange Online. We route all mail inbound and outbound via Exchange Server. I'd like to create a search folder in Outlook to show only mails from external senders. The issue is the only criteria I can seem to create would rely on the From field and this seems to map to the SenderName on the MailItem object in Outlook. This is not the actual sender's mail address that would include the @domain etc but rather seems to be the senders name which is arbitrary from I can see e.g SomeSender. How to create a search folder based on the senders actual address?Exchange Online Restricts the Number of Dynamic Distribution Groups
Exchange Online is imposing a new tenant-wide limit of 3,000 Dynamic Distribution Groups. Few tenants might be affected, but the question might be asked why Microsoft is limiting DDGs at this point. Is it a cunning plan to prompt people to use dynamic Microsoft 365 groups instead? Or are some tenants abusing DDGs in weird and wonderful ways? Who knows, but the limit applies from early April 2025. https://office365itpros.com/2025/03/10/dynamic-distribution-groups-limit/
Exchange Online calendar sync tool
We have developed software that synchronizes Exchange calendars. For the past few months, we have been facing a new problem that we did not have before. We synchronize calendar entries based on the LastModifiedDateTime attribute of the Microsoft.Graph.Event class. We are puzzled by the fact that this attribute magically changes without any adjustments on our part. Do you have any advice on this?
Exchange Hybrid Wizard Error (413)
Hello, we are running into issues with the Hybrid Wizard. On the last point validation, we always getting the same error and dont know what to do, cuz it says the external server is responding with.... See Log attached. 2025.03.05 08:43:02.035 *ERROR* 10349 [Client=UX, Page=HybridConnectorInstall, Thread=8] The connection to the server '6499703f-91f1-4369-a729-b40098fdd276.resource.mailboxmigration.his.msappproxy.net' could not be completed., The call to 'https://6499703f-91f1-4369-a729-b40098fdd276.resource.mailboxmigration.his.msappproxy.net/EWS/mrsproxy.svc' failed. Error details: The remote server returned an unexpected response: (413) RequestEntityTooLarge.., The remote server returned an unexpected response: (413) RequestEntityTooLarge. OriginalFailureType: ProtocolException, WellKnownException: MRSRemote None MRSRemote Remote stack trace: Remote trace: at System.ServiceModel.Channels.HttpResponseMessageHelper.ValidateResponseStatusCode() at System.ServiceModel.Channels.HttpResponseMessageHelper.ParseIncomingResponse(TimeoutHelper timeoutHelper) at System.ServiceModel.Channels.HttpChannelFactory`1.HttpClientRequestChannel.HttpClientChannelAsyncRequest.ReceiveReplyAsync(TimeoutHelper timeoutHelper) at System.ServiceModel.Channels.RequestChannel.RequestAsync(Message message, TimeSpan timeout) at System.ServiceModel.Channels.ClientReliableChannelBinder`1.RequestAsync(Message message, TimeSpan timeout, MaskingMode maskingMode) at System.ServiceModel.Channels.RequestReliableRequestor.OnRequestAsync(Message request, TimeSpan timeout, Boolean last) at System.ServiceModel.Channels.ReliableRequestor.RequestAsync(TimeSpan timeout) at System.ServiceModel.Channels.ClientReliableSession.OpenAsync(TimeSpan timeout) at System.ServiceModel.Channels.ReliableRequestSessionChannel.OnOpenAsync(TimeSpan timeout) at System.ServiceModel.Channels.ReliableRequestSessionChannel.OnOpenAsync(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.OnOpenAsyncInternal(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.System.ServiceModel.IAsyncCommunicationObject.OpenAsync(TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannel.OnOpenAsync(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.OnOpenAsyncInternal(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.System.ServiceModel.IAsyncCommunicationObject.OpenAsync(TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannel.CallOpenOnce.System.ServiceModel.Channels.ServiceChannel.ICallOnce.Call(ServiceChannel channel, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(MethodInfo targetMethod, Object[] args) at generatedProxy_3.ExchangeVersionInformation(VersionInformation, VersionInformation&) at Microsoft.Exchange.Connections.Common.WcfClientWithFaultHandling`2.<>c__DisplayClass4_0.<CallService>b__0() in \_\sources\dev\common\src\Connections\Common\WcfClientWithFaultHandling.cs:line 76 at Microsoft.Exchange.Net.WcfClientBase`1.CallService(Action serviceCall, String context)Transport Rule and Mail-enabled Security Group: Delayed Evaluation of Group Members
I have the following transport rule: If the message: Is sent to a member of group 'group-name@domain' Take the following actions: Redirect the message to 'shared-mailbox@domain' and Stop processing more rules When I add or remove members of the mail-enabled security group it takes a very long time until the transport rule seems to notice. Meaning, after adding members the messages are still NOT redirected and after removing member the messages ARE still redirected. It takes about 4 hours until the change of the group becomes effective. After that the rule works perfectly fine. Did anyone come across this too and is there any way to circumvent this?
