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:

The error I was getting:

The usual suspect is that the object was not cleanly removed from the domain, so remove
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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:

The odd thing was that
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Exchange: Checking the CAS and MBX servers used in an EWS Request

Recently I have been working on an issue where EWS requests sent to an Exchange environment were not working with the expected Exchange Version. The environment was in transition so was running both Exchange 2016 and 2010. All mailboxes involved in the request were hosted on 2016 and the CAS services had already been cut
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Exchange 2007 SP3: Exchange Server Setup encountered and Error.

Not the most useful error message that you will ever see. Combine this with a lack of information in the Exchange Setup Log and in the Event Viewer you have a small mystery. However, the answer is probably really simple: Check you have met the pre-requisites for the setup to run. Member of Enterprise Administrators
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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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