Practical Graph: Analyzing External Meeting Participants for Teams Meetings
A reader asked if it's possible to analyze the external meeting participants for Teams online events. The information is available through the Events Graph API, and some PowerShell code written using the Graph PowerShell SDK quickly extracts events to analyze and determine the set of external domains meeting participants come from. https://practical365.com/external-meeting-participants-analysis/Create bookingStaffMember also requires Add-MailboxPermission
I created an Entra application with the required Graph permissions to manage Bookings scheduling mailboxes so that I could update the staffing for a Bookings page that I'm not a staff member of. Using that application to request a Microsoft Graph access token, meant I had the required permissions to add a user account (that already had a Bookings license) as an "administrator" (role) for a Bookings page (Bookings business), to replace another person who was the previous Bookings page administrator, but who had since left. I used https://learn.microsoft.com/en-us/graph/api/bookingbusiness-post-staffmembers?view=graph-rest-1.0&tabs=powershell to do this. For the record, I was not able to do this using https://learn.microsoft.com/en-us/powershell/module/microsoft.graph.bookings/new-mgbookingbusinessstaffmember?view=graph-powershell-1.0 using Microsoft.Graph.Bookings module version 2.30.0, presumably because I am not a staff member with the Bookings "administrator" role for that particular Bookings page. However, the newly added user could not access that Bookings page at https://outlook.office.com/bookings/homepage until a further step had been completed (Error: "You don't have access to this booking page" shows instead). To ensure the new Bookings page administrator could access the Bookings page, I needed to add mailbox permissions, which I used https://learn.microsoft.com/en-us/powershell/module/exchangepowershell/add-mailboxpermission?view=exchange-ps for. I found that giving the new Bookings page administrator full access to the scheduling mailbox ensured they could access the Bookings page. Example using ExchangeOnlineManagement PowerShell module: Add-MailboxPermission -Identity email address removed for privacy reasons -User email address removed for privacy reasons -AccessRights FullAccess If there is a more efficient way for an system admin to add new staff to a Bookings page, please let me know - otherwise, hopefully this helps someone who gets stuck đ
Unable to whitelist quarantined emails
We have an email that is being constantly quarantined from a webform. The email comes from the email of the web form server, but is spoofing an internal address in our tenant by design. The email keeps getting blocked, and nothing we've tried as far as transport rules, whitelist additions, etc has been able to discernably affect this. There is a option to create a tenant allow list entry but the maximum duration is 45 days. We need a way to reliably whitelist an email indefinitely.Outlook 365: Folder sorting resets automatically to AâZ
Outlook 365 â Folder sorting resets automatically Environment: - Outlook desktop app (Microsoft 365) - Exchange / Office 365 mailbox - Dark mode enabled - Multiple shared mailboxes Problem description: Outlook automatically changes the folder sorting/display settings without user action. The option âSort subfolders A to Zâ reactivates randomly during the day. The configured sorting (e.g., Received â Descending) resets several times per day. In View Settings, the sorting remains configured correctly, but visually Outlook displays a different order. The issue occurs across multiple folders (Inbox, shared mailboxes). Actions already taken: - Verified and modified sorting via View > View Settings > Sort. - Applied the same view to multiple folders. - Confirmed that the settings remain saved correctly. - Issue persists: the parameter stays the same, but Outlook displays mails differently after refresh. Possible causes considered: 1. Outlook bug â display refresh resets the sorting visually even though settings remain unchanged. 2. Corrupted Outlook views â local view definition might be corrupted (outlook.exe /cleanviews). 3. Outlook add-in â third-party add-in may override sorting. 4. Exchange synchronization â server-side policy may enforce default sorting on shared mailboxes. 5. Recent Microsoft 365 updates â some users have reported similar issues in 2025 (views automatically resetting). Request: - Confirm whether this is a known Outlook 365 bug related to automatic resetting of folder views/sorting. - Provide solution or patch/workaround. - Official Microsoft recommendations to prevent Outlook from reverting to A â Z sorting automatically.
SPF, DKIM and DMARC bypassed for guest users
I manage a small non-profit using Microsoft 365 Business Basic. Most of the people on our board of directors are added as unlicensed guest users so that they can participate in Teams chats and meetings and to access our Sharepoint without using up a license. The problem: any email sent from an internal licensed user (or shared mailbox) to one of these guest users completely bypasses our domain's SPF, DKIM and DMARC configuration, resulting in bounced emails (particularly for recipients using gmail). Mail sent from an internal licensed user to any external address NOT registered as a guest user correctly passes SPF, DKIM and DMARC checks. I gather that this is because guest users are viewed as "internal" despite having external email addresses, but it seems like a serious limitation if I cannot reliably send email to anyone who is a guest user. Is there any extra configuration I can do to enable SPF, DKIM and DMARC for email to guest users?
Outlook âMessages in This Conversationâ Shows Unrelated Emails Despite Exact Match
Hi, Iâm having an issue with Outlookâs âMessages in this Conversationâ search. When I rightâclick an email, say the subject is âWeekly Project Updateâ, and choose Find Related - Messages in this Conversation, I expect to see only emails with that same subject. Iâve even set the advanced search condition to Subject is (exactly). Despite that, I still get a mix of unrelated emails like âRe: Lunch Plansâ or âQuick Questionâ appearing in the results. It feels like the search isnât respecting the exact-match setting and is just grabbing anything loosely related. its Outlook 2016 Couldnt find any information about it online, any help would be appreciated, thanks.Removing Obsolete Mobile Device Partnerships from Exchange Online
This article discusses how to use PowerShell to find obsolete mobile device partnerships in Exchange Online (or Exchange Server) and remove the obsolete devices. Users wonât be able to remove obsolete mobile devices after the settings to manage mobile devices are removed from OWA and the New Outlook, so cleaning up the mess is the responsibility of administrators (like it usually always is). https://office365itpros.com/2025/08/20/obsolete-mobile-device-cleanup/
Attachment issue in New Outlook
Hi, Some, but not all, PDF attachments cannot be opened from New Outlook. It seems to be related to the size of the PDF attachment - some of the large files cannot be opened anymore. The error message on opening is that the file is corrupted. From OWA Outlook, the attachment opens in Adobe Reader or in the browser, regardless of which one is used, so the file on the Exchange is not damaged. This issue started happening a few days ago, during August 2025. I contacted Adobe support and they are addressing the issue to the Microsoft. How do I fix the issue without reverting to classic Outlook or opening attachments from OWS Outlook? Also, downloading the attachment to my computer is not an option as it does not solve anything - the attachment file is still corrupt and this makes the workflow unnecessarily complicated. Mirko
Get-MessageTraceV2 not recognized
I'm updating a script that automatically pulls message traces in Exchange Online. From my understanding, the Get-MessageTrace cmdlet will no longer work at the end of the month, and it needs to be upgraded to Get-MessageTraceV2. Below is the script. # Connect to Exchange Online Connect-ExchangeOnline -ShowBanner:$False # Define the start and end dates for the mail trace $startDate = (Get-Date).AddDays(-7).ToString("MM/dd/yyyy") $endDate = (Get-Date).ToString("MM/dd/yyyy") # Get the mail trace $params = @{ StartDate = $start DateEndDate = $endDate SenderAddress = "email address removed for privacy reasons" Status = "Failed" } Get-MessageTraceV2 @params Each time I run it, I get an error that the Get-MessageTracev2 is not recognized. I've confirmed I have ExchangeOnlineManagement module 3.8 installed (Microsoft documentation says the cmdlet was introduced in 3.7). When I run "Get-Command Get-MessageTraceV2" I get the same message saying the cmdlet is not recognized. When I try "Get-Command *V2" it lists several cmdlets from Microsoft.Graph but nothing from ExchangeOnlineManagement. I've tried the following all with the same results. Uninstalling and reinstalling the ExchangeOnlineManagement module. Installing with the -AllowClobber switch. Installed PowerShell 7 and installed the 3.9 prerelease. On a freshly reset computer, installed ExchangeOnlineManagement module. On the fresh computer, I uninstalled and then installed prerelease. I'm able to use other ExchangeOnlineManagement cmdlets like Get-Mailbox without issues. I am using a GCC tenant if that matters (I hope not). What am I missing (besides the cmdlet haha)?
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 Singh
