Exchange

How to enforce email confidentiality in Exchange

Introduction The "Private" sensitivity level in Outlook is a property of the message. In transit, it is represented by the SMTP header "Sensitivity: Private", which Exchange maps to the

Exchange mailboxes increased to 100GB

Maxime Hiez
Exchange
27 Aug, 2026

Introduction On August 19, 2026, the Exchange team detailed a licensing change that went relatively unnoticed ; the Microsoft 365 Business Basic, Business Standard and *Business Premi

End of the ESU program for Exchange Server 2016/2019

Maxime Hiez
Exchange
24 Aug, 2026

Introduction On August 14, 2026, the Exchange Server team put an end to the speculation : the Extended Security Update (ESU) program for Exchange Server 2016 and *Exchange Server 20

Free/Busy sharing moves to Cross-Tenant Access Policy

Maxime Hiez
Exchange
19 Aug, 2026

Introduction The Exchange Online team announced the move of cross-tenant sharing of Free/Busy, MailTips and calendars to the Microsoft 365 Cross-Tenant Access Policy. These three scen

How to configure calendar sharing in Exchange

Introduction In a context where organizations are collaborating more closely, it's not uncommon for users within one organization to need to efficiently schedule meetings by accessing the c

Fin du support pour Exchange Server 2016/2019

Maxime Hiez
Exchange
15 Oct, 2025

Introduction As of yesterday (October 14, 2025), Exchange Server 2016 and Exchange Server 2016 are no longer supported by Microsoft. Stability / performance bug fixes and security updat

Email sending limits for Exchange Online tenants

Maxime Hiez
Exchange
24 Feb, 2025

Introduction Microsoft recently announced the introduction of new outgoing email sending limits for Exchange Online tenants. These new limits, called *Tenant External Recipient Rate Limit

End of support for Exchange Server 2016/2019

Maxime Hiez
Exchange
19 Jan, 2025

Introduction Microsoft has announced that support for Exchange Server 2016 and Exchange Server 2019 will end on October 14, 2025 (along with Skype for Business Server 2015/2019 and *W