Are you trying to install the update as administrator?
Check following links -
Repair failed installations of Exchange Cumulative and Security updates
How to Repair A Failed Exchange 2016 CU Installation
Security Update For Exchange Server 2016 CU21 (KB5007409)
Hello
I've just updated an exchange server to CU 20 ,SU 3 to Cu 21.
All went as plan but now
Server build is Version 15.1 (Build 2308.8)
Exchange forest Schema Version = 15334
Exchange domain Schema Version 13241
Nothing in logs showing issues and all service look to be OK
BUT
when I try to install
Security Update For Exchange Server 2016 CU21 (KB5007409) via windows update
I get this
Installation status: Failed
Error details: Code 8024002D
I download the file but when I run it from CMD , as administrator.
it can't find the MSI . I direct it to Install drive for CU 21 but I get this
Reinstall CU didn't help
Any help would be appreciated
Dean
Exchange | Exchange Server | Management
6 answers
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Amit Singh 5,306 Reputation points
2021-11-16T04:36:19+00:00 -
Andy David - MVP 157.8K Reputation points MVP Volunteer Moderator
2021-11-15T20:42:45.143+00:00 Can you verify that you downloaded the SU from:
https://www.microsoft.com/en-us/download/details.aspx?id=103645Be sure to reboot the server before trying the manual install.
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Andy David - MVP 157.8K Reputation points MVP Volunteer Moderator
2021-11-16T13:21:44.22+00:00 Can you run the health checker? See what build it reports and any installed Security Updates?
https://microsoft.github.io/CSS-Exchange/Diagnostics/HealthChecker/
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Andy David - MVP 157.8K Reputation points MVP Volunteer Moderator
2021-11-16T14:36:23.757+00:00 Yea, its right there:
Exchange IU or Security Hotfix Detected.
Security Update for Exchange Server 2016 Cumulative Update 20 (KB5003435)
Security Update for Exchange Server 2016 Cumulative Update 20 (KB5004779)when prompted for the msi does it work if you browse to the setup files where Exch is installed? Versus where the Cu21 setup program is?
Also, is the only server you have seen this on? Looks like you have more than one
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Andy David - MVP 157.8K Reputation points MVP Volunteer Moderator
2021-11-16T19:06:32.613+00:00 Never seen that and the only fix I can find is:
http://jurgenvm.blogspot.com/2016/10/installing-update-rollup-21-for.htmlNo idea if that will fix it though or if you want to even attempt that.