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Released: August 2023 Exchange Server Security Updates

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The_Exchange_Team
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Aug 08, 2023
Update 10/10/2023: Our recommendation to address CVE-2023-21709 is now changed; please see the changes below. Update 9/12/2023: As a part of the September 2023 "Patch Tuesday" we have released a fe...
Updated Oct 10, 2023
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Nino_Bilic's avatar
Nino_Bilic
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Aug 23, 2023

stetze We have tried to reproduce this and... actually, there is no difference between August 2023 SU (or not). In other words - both August and pre-August SUs behave the same and the meeting body is "read only" in that other recipient's mailbox...

After doing a bit more digging, I am wondering if this is what caused this change: https://support.microsoft.com/en-us/office/images-are-blocked-and-meeting-body-is-read-only-in-outlook-desktop-if-calendar-items-are-from-other-senders-for-microsoft-outlook-spoofing-vulnerability-released-august-8-2023-e11aee6f-fc9a-45da-889a-9e854a2d1efc - in other words, when meeting is received, the meeting body is now read only after this Outlook security change... and if so, this is not a change related to Exchange SU.