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Microsoft released another important Exchange security update for Exchange 2013 /2016 /2019. There are some things you have to know about that update.
First of all: Zero day vulnerability september is fixed with this update.
See the official article here and the download links:
- Exchange Server 2013 CU23 (support ends in April 2023)
- Exchange Server 2016 CU22 and CU23
- Exchange Server 2019 CU11 and CU12
Let’s have a look the FAQs they are really useful.
Microsoft recommends not to remove the URL rewrite workaround, only if you really want to to that. Of course you need to update Exchange to this latest november update before. EEMS is also applying the workaround some days unti signatures are updated. See this article about EEMS.
There are no changes and steps required concerning exchange hybrid, no need to restart exchange hybrid configuration wizard.
The manual way of updating is the same as it was before. Here are some informations for upgrade paths.
Of course don’t forget to run the Exchange Healthchecker after the update to see the changes made successfully.
I wish you success installing the update on Exchange. If you liked this post, please click on “helpful”.