Si toi aussi tu gères un Exchange 2016 sous VMWare et que les updates Windows ont bousillé tes volumes ReFS: https://kb.vmware.com/s/article/1012225?lang=en_us

• From a web browser, connect to the vSphere Web Client.
• Log in with Administrator credentials.
• Navigate to the virtual machine you want to modify.
• Power off the virtual machine.
• Right-click the virtual machine and select Edit Settings.
• Click the VM Options tab.
• Click Advanced > Edit Configuration.
• Either select Add Row, or enter the values directly into the provided fields at the bottom.
• Insert a new row with the name devices.hotplug and a value of false.
• Power on the virtual machine.

J'allais commencer à désinstaller les updates, ce paramètre m'a fait gagner un temps infini.