A reminder that on September 16 2025, we will enforce the first temporary block of shared security principal use for our hybrid customers.  

Information für Administratoren von M365- und Exchange Online-Systemen. Ab 1. Oktober 2026 werden die Exchange Web Services (EWS) eingestellt. Das wirkt sich auf Tenant-übergreifende Frei/

Recently, we had to create a new org-relationship with a customer. We did this several times before, and it takes 5-10 minutes. However, this time it took longer, and once we’ve figured out t…

We wanted to provide information related to migration of existing Exchange Online Organization Relationships to the new sharing model.  

We wanted to provide information related to migration of existing Exchange Online Organization Relationships to the new sharing model.  

In April 2025, Microsoft announced a 2-stage process for upcoming changes to Exchange hybrid rich coexistence deployments (deployments with Exchange Server users that need Free/Busy, MailTips, profile...

We wanted to provide information related to migration of existing Exchange Online Organization Relationships to the new sharing model.  

Hello Everyone! I'm trying to setup a global MailTip or alert which would notify a user when they are sending an e-mail containing **attachments** to an **external recipient**. I'm trying to weigh all the possibilities available and so far I've seen options with exchange MailTips and Purview DLP policies. I have played a little bit with MailTips and turned on the "-MailTipsExternalRecipientsEnabled" option with PowerShell. This works great but only addresses half of my want list. Is there a way to modify this MailTip rule to apply only when the email contains an attachment? Not seeing too much on the official MS documentation, unless I'm not looking in the right place. If not doable via MailTips, does anyone have any other suggestion to do this?

We would like to implement a warning message that alerts users when they are sending an email to an external recipient. We initially tried using DLP policies to achieve this, but it seems that DLP only allows control over emails sent outside the organization when they contain attachments. We tried using MailTips as a potential solution, but it appears that Microsoft may have changed the functionality of MailTips. As far as I can tell, they no longer offer the capability we need for this scenario. Can somebody determine how we can configure a system that notifies end users when they are sending emails to external recipients? We’re looking for a solution that either prompts the user or provides some form of notification.

Wer eine Exchange-Hybridumgebung nutzt und weiterhin Rich-Coexistence-Features wie Free/Busy-Lookups, MailTips und Profilbilder zwischen On-Premises- und Exchange-Online-Postfächern erforderlich hat, sollte den neuen Termin im Oktober 2026 vormerken. Bis dahin muss der Umstieg von Exchange Web Services auf Microsoft Graph abgeschlossen sein. Für Nutzer von Exchange 2016 oder 2019 stellt sich hierbei ein echtes Problem, da für diese Versionen ein solcher Wechsel nicht möglich ist.

Wer eine Exchange-Hybridumgebung betreibt und weiterhin auf Rich-Coexistence-Features angewiesen ist, also Free/Busy-Lookups, MailTips und Profilbilder zwischen On-Premises- und Exchange-Online-Postfächern, der hat jetzt einen neuen Termin im Kalender: Oktober 2026. Bis dahin muss der Wechsel von Exchange Web Services auf Microsoft Graph vollzogen sein. Und wer noch Exchange 2016 oder 2019 betreibt, hat dabei ein echtes Problem, denn für diese Versionen gibt es diesen Wechsel schlicht nicht.

A new update for Outlook on iOS and Android enhances the External Recipients MailTips feature, improving offline accuracy and performance. Users will benefit from better internal domain information re...