Microsoft has released Security Updates (SUs) for vulnerabilities found in:
Exchange Server Subscription Edition (SE)
Exchange Server 2019
Exchange Server 2016
SUs are available for the f...
Updated Sep 08, 2026
Version 7.0
Blog Post
Since exactly after installing Aug.26 Updates i have a ~ 2 Min Message Latency of nearly every Mail.
(Windows 2022 + CU KB5120242 + NET KB5121650; Exchange SE + SU9 KB5121573; German Localization Windows+Exchange)
SMR 0,1
CAT → CATMS 15,0
QDM (Queue) 0,03
SDD → SDDR 120,2
These values (CATMS=15.001 / SDDR=120.216 ) are alway suspiciously round (15/120), so it looks like a timeout occurred in some component. Nothing logged in Eventviewer.
+1 to this issue. Installed July updates Windows & Office. English server localization.
Windows 2022 KB5099540 + NET KB5102206 + Exchange SE SU9 KB5121573 + Office updates
Get-WinEvent -FilterHashtable @{LogName='Application'; ProviderName='MSExchangeIS'} -MaxEvents 20 | Select-Object TimeCreated, Id, LevelDisplayName, Message | Format-Table -Wrap 07.09.2026 14:08:32 1041 Information Microsoft Exchange Information Store service has completed an internal schema upgrade on (Folder) (133d****-****-****-****-********4764[1]-34*****47). The upgrade has brought the version from (0.143) to (0.185). 07.09.2026 14:08:32 1040 Information Microsoft Exchange Information Store service will perform an internal schema upgrade on (Folder) (133d****-****-****-****-********4764[1]-34*****47). The upgrade will bring the version from (0.143) to (0.144). 07.09.2026 14:02:08 1041 Information Microsoft Exchange Information Store service has completed an internal schema upgrade on (Folder) (f61f****-****-****-****-********9a03[1]-48*****EB). The upgrade has brought the version from (0.143) to (0.185). 07.09.2026 14:02:08 1040 Information Microsoft Exchange Information Store service will perform an internal schema upgrade on (Folder) (f61f****-****-****-****-********9a03[1]-48*****EB). The upgrade will bring the version from (0.143) to (0.144). 07.09.2026 13:59:54 1075 Information Database cache resizing has finished after 0 second(s). 07.09.2026 13:59:54 1074 Information Database cache resizing has started. 07.09.2026 13:49:53 1075 Information Database cache resizing has finished after 0 second(s). 07.09.2026 13:49:53 1074 Information Database cache resizing has started. 07.09.2026 13:46:18 1041 Information Microsoft Exchange Information Store service has completed an internal schema upgrade on (Folder) (f61f****-****-****-****-********9a03[1]-48*****E3). The upgrade has brought the version from (0.143) to (0.185). 07.09.2026 13:46:18 1040 Information Microsoft Exchange Information Store service will perform an internal schema upgrade on (Folder) (f61f****-****-****-****-********9a03[1]-48*****E3). The upgrade will bring the version from (0.143) to (0.144). 07.09.2026 13:39:53 1075 Information Database cache resizing has finished after 0 second(s). 07.09.2026 13:39:53 1074 Information Database cache resizing has started. 07.09.2026 13:29:52 1075 Information Database cache resizing has finished after 0 second(s). 07.09.2026 13:29:52 1074 Information Database cache resizing has started. 07.09.2026 13:19:51 1075 Information Database cache resizing has finished after 0 second(s). 07.09.2026 13:09:44 1074 Information Database cache resizing has started. 07.09.2026 13:09:41 40036 Information Information Store object c422****-****-****-****-********5828 configuration. Read-once configuration: { "TrackAllLockAcquisition":false, "LogPath":"%ExchangeInstallDir%\\Logging\\Store\\", "ThreadHangDetectionTimeout":"02:00:00",