Depending on your organization’s size, you may need to wait 15 minutes or a few hours for replication to complete. Remember to reboot your server after installing the IIS Rewrite Module before attempting the upgrade or new installation.ĭo not forget to run the commands to PrepareAD and PrepareSchema. In my test lab, I did not need to install the second option, but the IIS module was required. Universal C Runtime in Windows KB2999226.With the upgrade to CU22, you need to install the additional prerequisites listed below: More can be found in this bulletin from Microsoft:Įxchange and IT admins experienced with running Cumulative Updates (CU) for Exchange know you should make sure to install all the prerequisites on the server before applying the CU. Exchange 2016 CU22 was released in September, and it came with a new feature called “Exchange Emergency Mitigation service.” What this service does is help secure your Exchange servers by applying mitigations to address potential threats. They provided detailed information on how to check the version you are on and how to upgrade to the latest Cumulative Update (CU). In the months that followed, Microsoft released patches to mitigate these risks and encouraged everyone running Exchange on-premises to patch servers.
Mass downtime and associated costs resulted because of these attacks. In March, many Exchange servers came under attack and this forced many organizations to recover servers or start again because they didn’t have backups.
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