Microsoft has released security updates for vulnerabilities found in:
Exchange Server 2013
Exchange Server 2016
Exchange Server 2019
All versions (Cumulative Update levels) are impacted. ...
Updated Aug 05, 2021
Version 15.0
Blog Post
The_Exchange_Team Nino_Bilic Yeroen1966
I am seeing the same thing Yeroen1966 is with the schema update. The .msp patch file pulled down through Windows Update contains the newer LDF files but it only extracted the files named:
PostExchange2000_schema99.ldf
PostExchange2003_schema99.ldf
PostWindows2003_schema99.ldf
schema99.ldf
These ldf files did not get extracted and loaded:
schemaadam.ldf
SchemaVersion.ldf
So it appears only part of the schema got updated. The https://github.com/microsoft/CSS-Exchange/commit/f6805d578c67bf82f4fda979dd871fa2ea30bf40#diff-b069450bcfea6a984861d9882318306d28b1012ee10fb0a8c36c37e99d48e496 script also doesn't seem to check all parts of the schema so it gives a false positive of it being patched? Schema version stays at 15312 because of the two missed files.
So do we manually load the two missing files??
Edit: Just saw the note added about the schema version not updating if you were already on CU23 and applied the July patch.