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Exchange Team Blog

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Released: July 2021 Exchange Server Security Updates

Platinum Contributor

Jul 13, 2021

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

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Joined April 19, 2019

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Exchange Team Blog

You Had Me at EHLO.

Duncan1528

Brass Contributor

Jul 17, 2021

I am running CU20 with July2021 SecurityUpdates. As I have read, I now have to update the Schema with CU21.

Is it sufficient to only run this command: Setup.exe /PrepareSchema /IAcceptExchangeServerLicenseTerms

or do I have to run all of the 3 commands?

Setup.exe /PrepareSchema /IAcceptExchangeServerLicenseTerms

Setup.exe /PrepareAD /OrganizationName:"ExchangeOrganisationName" /IAcceptExchangeServerLicenseTerms

Setup.exe /PrepareAllDomains /IAcceptExchangeServerLicenseTerms

Sorry for asking, but I have never installed CUs using the command line...

After schema update (to schema of CU21) is it safe to stay on CU20 for a while? We don't have the time at the moment to test CU21 in detail.