Blog Post

Exchange Team Blog
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Released: July 2021 Exchange Server Security Updates

The_Exchange_Team's avatar
The_Exchange_Team
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
announcements
Exchange 2013
exchange 2016
exchange 2019
security
setup
wazcal's avatar
wazcal
Copper Contributor
Jul 15, 2021

Re-Post with updates:

We have Exchange 2016 CU20 servers and have installed July 2021 security updates but did not yet run /PrepareSchema using June 2021 CU21 yet.

Question1: Can we update the schema only but otherwise not install CU21? Is this supported?

Question2: I’ve seen some different paths referenced to setup.exe for the schema update - if we do only apply the CU21 schema update, am I correct the setup.exe to be used is the one in CU21's mounted ISO?

Question3: Assuming it is supported to only update the schema for a 2016CU20 server with the July 2021 SU's installed - is it only /PrepareSchema that is required? (ie we don't have to run /PrepareAD or /PrepareDomain until we are ready to actually install CU21)