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After the first try of August 2023 Security Update for Exchange was not that successful, especially for non-english operating systems, there is now a new August Update V2 available. Exchange SU August 2023 SU9V2
See the latest Exchange Team Blog.
New download link for V2 Update
NOTE: after installing SU9V2 there are some to dos like V1 update.
You have to execute PowerScript for CVE-2023-21709.
All the information are summarized in this table.