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)Public Folder Calendar Creation
We use basic public folder calendars for a number of things. These were originally hosted on on-prem Exchange, and are now on Exchange Online. I normally create them in Outlook, and select 'calendar items' from the list of types. However, I'm currently testing New Outlook, and that doesn't appear to have any ability to create public folders (you can only add existing ones to the favourites list). So I've looked in Exchange Online, and although that can create public folders, it seems to only create basic empty public folders, with no ability to select calendar items to make a calender. Am I missing something obvious, or is it actually impossible to create public folder calendars if using a New Outlook / Exchange Online setup? ThanksHow to clear the Discovery Holds folder
To find whether this discovery holds folder is completely full, use the below-mentioned command. Step 1: Connect-ExchangeOnline and then, Step 2: Get-MailboxFolderStatistics -Identity user | select name,foldersize Note: This DiscoveryHolds folder is having a limit of 100 GB. If it is full, we will get issues like "Unable to clear deleted items folder", "deleted items are getting auto-restored" etc., One of the reasons for this folder is full: If Organization Hold is turned on(All Exchange mailboxes are selected in Compliance Retention Policy) or the Individual ID is selected on Compliance Retention Policy. Solution: Please try the below-mentioned steps to overcome this issue. Step 1: Exclude the DiscoveryHolds full ID in the Compliance Retention policy or run the below-mentioned commands in PowerShell. Connect-IPPSSession and then, Set-RetentionCompliancePolicy -Identity "Compliance Retention Policy Name" -AddExchangeLocationException user for multiple users, Set-RetentionCompliancePolicy -Identity "Compliance Retention Policy Name" -AddExchangeLocationException user1, user2, user3 Now on PowerShell, Connect-ExchangeOnline and then, Set-Mailbox -Identity user -RetainDeletedItemsFor 0 and then run the below-mentioned command two times. Start-Managedfolderassistant -Identity user Start-Managedfolderassistant -Identity user After 2-3 minutes, run the below-mentioned commands. Get-Mailbox "user" | FL DelayHoldApplied,DelayReleaseHoldApplied If the output is received as true for any above-mentioned holds, then run the below-mentioned commands. Set-Mailbox user -RemoveDelayHoldApplied Set-Mailbox user -RemoveDelayReleaseHoldApplied and then run the below-mentioned command two times. Start-Managedfolderassistant -Identity user Start-Managedfolderassistant -Identity user After 2-3 minutes, this DiscoveryHolds folder will become zero as per the below-mentioned screenshot. This process helped me a lot. If you have any doubts/concerns/suggestions about this post, please comment below. Best Regards, Venkat Kiran Kona.
Converting Soft-deleted EOX Mailboxes to Inactive EOX Mailboxes
Hello. In our organization we are prone to actioning PATI requests (Public Access to Information). So when an employee leaves, we must retain the mailbox almost indefinitely. Moving forward, an active retention policy that converts any un-licensed user or shared mailboxes into inactive mailboxes is in place. What to do with the many soft-deleted mailboxes, is the question now. Other than re-enable each mailbox with a license, then allowing the policy to work, is there a PowerShell script or scripts, that will convert the mailbox somehow from soft-delete to inactive? Any ideas anyone? Thanks in advance.
Aliasses not showing up in Outlook (classic)
Hello, We have a little issue with aliasses that are configured for some users. New configured aliasses are not shown in Outlook (classic); aliasses that are added in the past are visible. When I use OWA, the new alias is also visible. And also in the offline addressbook the properties are up to date. How can I trigger Outlook to synchronize the new added aliasses? Kind regards, ArjanUnable to Add Exchange 2019 Email Account (Ionos) to Outlook (New) on Windows 11
Hello everyone, unfortunately, I am unable to add my Ionos (Exchange 2019) email account to the Outlook Windows app. On Windows 10, it was still possible to manually configure an Outlook account, which worked fine. However, on Windows 11, this option is no longer available, and I can’t revert to the previous version of Outlook either. When I try to add the account by selecting Microsoft 365 - Office 365, Exchange and entering my email address, I always get the error message: We couldn't find a work or school account with that email address. I have already contacted Ionos, but they couldn’t solve the issue either. They mentioned that Microsoft doesn’t allow setting up an Exchange account this way, even though the option is listed in the selection menu. Does anyone know how to fix that? Thank you very much!Dynamic Distribution Group with no Disabled Accounts
Hi I'm trying to build a few Dynamic Distribution Lists in Exchange Online and want to only include Active Users (i.e., users that are marked "Active" in Azure AD). I've tried using the UserAccountControl attribute (-eq 514 or -ne 514 - both are returning the same results, which is strange), but it still includes user accounts that are disabled. This is how my recipient filter looks like: RecipientType -eq 'UserMailbox' -and UserAccountControl -ne 514 What's the best way to achieve this in Exchange Online? Thanks Taranjeet SinghArbitration Mailboxes not available
I have an environment with an Exchange 2013 (15.00.1497.048) and an Exchange 2019 CU14 server installed. The new 2019 server appears to be fully operational with the exception of the system mailboxes, which means I cannot migrate the mailboxes off the 2013 server. What I have tried to resolve this issue: Re-run /PrepareAD - This did create the AD accounts; however, the system mailboxes were not created and when attempting to enable them getting the following error: "The user's Active Directory account must be logon-disabled for linked, shared, or resource mailbox." Checked for disabled or soft-deleted mailboxes - none that match the GUIDs for the system mailboxes Deleted the system accounts from Active Directory and re-ran /PrepareAD. It ran successfully and created the AD accounts; however, still getting the same error when attempting to enable the mailboxes. Looking for any insight into how to resolve this issue.
Internal emails being treated as external emails
We have Exchange Online only - We have an application that sends out emails to users within the company however we have found an issue where all our distribution group recipients aren't getting the emails due to this email being treated as "outside organization". The email that's sending the mail is an internal Distribution group email which routes through an authorized connector.(I believe this is the cause of it being turned to "external" but unsure) We cannot allow the distribution groups to receive outside org mail, is there a way for us to bypass the connector with all the emails that would be effected? (would need something more dynamic than the rules in admin center) or a way for the mail to not be converted to "outside Organization"?
