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Andrew MorrisFlag for New Zealand asked on

Outlook cannot connect to the Office 365 email account with autoi discover

I have just setup a client with Office 365 Exchange. The old SBS server is still on site but I have stopped all the Exchange services.
When I try and add the new profile it goes away to autodiscover the account but seems to find the old SBS exchange rather than the Office 365 Exchange.

If I setup a non domain computer with the new email it works fine on the same LAN. I even tried unplugging the SBS server to see if I can connect but it will not work
Microsoft 365Email ClientsEmail ServersEmail Software

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crystal (strive4peace) - Microsoft MVP, Access

8/22/2022 - Mon
crystal (strive4peace) - Microsoft MVP, Access

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Jackie Man

My wild guess is that the DNS manager of your DC still points to autodiscover A records of the old SBS server.

You need to:-

1. Open the DNS manager on one of your Domain Controllers.
2. Expand out the management tree until you can see your Internal Domain’s Forward Lookup Zone. Click on it, and make sure there are no A records for autodiscover.domain.local in the zone.
3. Once no autodiscover A records exist, right click the Zone name and select Other New Records.
4. Select Service Location (SRV) from the list.
5. Enter the setting for the SRV to the one of your Office 365 Exchange.
6. Hit OK to finish adding the record.
Once the SRV record is added to the internal DNS zone, Outlook and other autodiscover clients that attempt to configure themselves with a domain.local SMTP address will work properly without the Certificate errors on all versions of Exchange.

Source: https://acbrownit.wordpress.com/2012/12/20/internal-dns-and-exchange-autodiscover/
crystal (strive4peace) - Microsoft MVP, Access

thanks for the explanation, Jackie  ~
Vasil Michev (MVP)

You can easily work around this by deploying the reg keys in this article: http://support.microsoft.com/kb/2212902

All you need working for O365 is the HTTP redirect method, you can block all others.
Experts Exchange is like having an extremely knowledgeable team sitting and waiting for your call. Couldn't do my job half as well as I do without it!
James Murphy
crystal (strive4peace) - Microsoft MVP, Access

Vasil, I looked at that link for 2013 running under Windows 10 but the registry keys are different -- I found autodiscover-s.outlook.com with a value of 0000 but the article is not clear what to do ... thanks
Vasil Michev (MVP)

The reg keys are the same, only the version number will differ (15.0 for Office 2013). But they are not present by default, so you need to create them (ExcludeHttpsAutoDiscoverDomain, ExcludeHttpsRootDomain and ExcludeScpLookup should be enough).
crystal (strive4peace) - Microsoft MVP, Access

thanks, Vasil
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