Autodiscover for Exchange 2010 to enable a 2016 Outlook to connect

I have a 2010 Exchange server that has an autodiscover A record in the local DNS settings which point to my internal Mail server's IP and a UCC SSL certificate that is correctly pointing external mobile and remote devices to my mail server which also references this autodiscover.
OWA works perfectly across all remote devices, iPad, Smartphones.
For some reason I can configure the in Windows 10 in a non-domain joined computer but when I try to connect using Outlook 2016 I have no joy.
I don't want to remove my autodiscover from DNS settings and fritz any computers from being able to connect.
Any ideas would be appreciated.
CaCloICT ManagerAsked:
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Jose Gabriel Ortega CastroEE Solution Guide - CEO Faru Bonon ITCommented:
Yes the issue is that you usually have Service Connection Points or (SCP)
And they can be Internal and externalURL.

If you set the Virtual Directories using ECP/Server/Virtual Directories you will miss a couple of URLs that can't be fixed using GUI (internal autodiscover 'in your case this is the one missing,' and PowerShell).

I'd recommend you to use my script to set the internals URLs in this link:

You can set them all using, this steps:
1. Open a PowerShell console with elevated privileges
2. Set execution policy to unrestricted by running
 set-executionpolicy unrestricted

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And accept the message ( r or y).

3. Download and save the script to your desktop.
4. Move to your desktop in the Powershell Console
cd  $env:userprofile\desktop

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5. And run the script
.\setAll.ps1 -set -urlpath "https://mail.<>./"

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Or just set internally:
.\setAll.ps1 -setInternal -urlpath "https://mail.<>./"

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CaCloICT ManagerAuthor Commented:
Hi Jose

I didn't have any joy getting your so I went old school and the Internal URL is set.  Just want to check that I can use the following to set the external URL which currently has nothing set:

Get-ExchangeServer | Where {($_.AdminDisplayVersion -Like "Version 14*") -And ($_.ServerRole -Like "*ClientAccess*")} | Set-ClientAccessServer -AutoDiscoverServiceExternalUri https://$AutodiscoverHostName/Autodiscover/Autodiscover.xml

I'm hoping that by setting this the non-domain Outlook 2016 machine will be able to at least connect using OWA/EWS.  It was so much easier when a manual server could be selected to go to either OWA or EWS as required.

Jose Gabriel Ortega CastroEE Solution Guide - CEO Faru Bonon ITCommented:
Well, it's another valid method.
Select the answer and close the question.
CaCloICT ManagerAuthor Commented:
Thank you Jose.

Without your solution I would have had trouble finding the way forward to resolve this problem.  I only wish I'd been able to save time with the script file automating the typing.  I will try adding the External shortly and hope that this will work for the External URL.

kind regards and thanks again
Seth SimmonsSr. Systems AdministratorCommented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Accept: Jose Gabriel Ortega C (https:#a42452438)

If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

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