New-OwaVirtualDirectory – An error occurred while creating the IIS virtual directory

During a recent update to Exchange 2016 CU9, I encountered the following error whilst trying to recreate one of the secondary OWA sites that I have running. The command being executed was: New-OwaVirtualDirectory -Server $ServerName -WebsiteName “EAC_Secondary” | Out-Null The error I was getting: An error occurred while creating the IIS virtual directory ‘IIS://exch04.domain.local/W3SVC/3/ROOT/owa’ on
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Test-ActiveSyncConnectivity – 403 Forbidden at ‘Issue an HTTP OPTIONS command’

I have spent some time troubleshooting an alert from SCOM that ActiveSync was not working on all Exchange 2010 servers in an environment. The environment is currently in co-existence with Exchange 2016, with all client access services already pointed to 2016. Running the Test-ActiveSyncConnectivity cmdlet returned the following result: Test-ActiveSyncConnectivity -TrustAnySSLCertificate:$true | fl … ClientAccessServer
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Could not access OWA using HTTPS – Error 404

Symptoms here are: Unable to access OWA Outlook 2007 reports that it is unable to change any Out Of Office settings; server unavailable. The enviroment: Microsoft Exchange 2007 running on Microsoft Windows Server 2008. One other symptom, which I don’t know if this resolved or something else did, is that the Free/Busy information was not
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