is Universal C Runtime in Windows (KB 2999226) required for server 2016 exchange 2016 CU22 ?

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KeithHotchkiss-2656 asked Dec 28, '21 JoshuaThompson-9840 answered Apr 28, '22

is Universal C Runtime in Windows (KB 2999226) required for server 2016 exchange 2016 CU22 ?

is Universal C Runtime in Windows (KB 2999226) required for server 2016 exchange 2016 CU22 ?
Cumulative Update 22 for Exchange Server 2016 (KB5005333)
Notice

This September 2021 cumulative update (CU) will install Exchange Emergency Mitigation (EM) service. This service is designed to help secure your servers that are running Microsoft Exchange Server by applying mitigations to address any potential threats against them. It uses the cloud-based Office Config Service (OCS) to check for and download available mitigations and to send diagnostic data to Microsoft.

This CU has the following additional prerequisites:

IIS URL Rewrite Module

Note The app pools are restarted as a part of the IIS Rewrite module installation. Therefore, service might be disrupted.

Universal C Runtime in Windows (KB 2999226)

office-exchange-server-administration windows-server-2016

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AaronXue-MSFT · Jan 03 at 05:58 AM

Hi @KeithHotchkiss-2656 ,
Agree with what they have replied above.

You need to install C Runtime in Windows (KB 2999226) before you install the Exchange 2016 CU22.

Have you installed the Exchange 2016 cu22 successfully?

If you have any questions or need further assistance, please feel free to post back.

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Answer 1 · 2021-12-28T23:53:58.41Z

DSPatrick answered Dec 28, '21 DSPatrick commented Dec 30, '21

Yes, looks like it
https://support.microsoft.com/en-us/topic/cumulative-update-22-for-exchange-server-2016-kb5005333-ceb154d8-7116-43a5-83c1-205af7c43764

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image.png (258.1 KiB)

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DSPatrick · Dec 30, 2021 at 01:37 PM

Just checking if there's any progress or updates?

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Answer 2 · 2021-12-30T04:44:53.47Z

abbodi86-0005 answered Dec 30, '21

UCRT is inbox component in Server 2016 and later
KB2999226 not needed or apply

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Answer 3 · 2021-12-30T11:31:42.867Z

LimitlessTechnology-2700 answered Dec 30, '21

Hi @KeithHotchkiss-2656

Thank you for your question and reaching out.

I understand that you have query regarding KB dependency.

Yes you are correct as per Microsoft KB documentation , KB5005333 has additional prerequisites which is Universal C Runtime in Windows (KB 2999226) and that it need be installed before installing of KB5005333 .

Hope this answers your question :)
Thank you.
Prakash

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Answer 4 · 2022-04-28T15:45:43.403Z

JoshuaThompson-9840 answered Apr 28, '22

The Universal C runtime shows that it is for Window Server 2012 and earlier. What if you are running Exchange 2016 on Windows Server 2016. is it still needed?
I do not see a download/update package for this runtime for Windows Server 2016.

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