As a part of Microsoft's Secure Future Initiative (SFI), security remains our top priority. In alignment with SFI, Exchange Server is implementing several changes to enhance the security of Exchange ...
Updated Aug 11, 2025
Version 11.0
Blog Post
Nino_Bilic Hello, we do not host any on-premises mailbox all are on O365, also we only Online Archive from on-premise which I believe would not impact in this change?
I would like to know in this case, I do not need to do anything if I am only using Exchange server as SMTP relay and recipient management?
what about Shared O365 Exchange Online? what will happen to that ? I am asking because We have few CA policy configured directing to this application like PowerShell block, would that be running or not?
I just want to understand if I dont run Dedicated Hybrid application which is not application in my case, so would there be any impact to those environments either Exchange on-premise or Exchange Online in any context?
Please advise and help to understand the impact if any.
- Nino_Bilic
Microsoft
The only features impacted here are: free/busy lookups, MailTips and profile picture sharing / lookups between user mailboxes on-premises and Exchange online.
No other scenarios are impacted if you do not create the Dedicated Hybrid App after October 2025.
