Comments on: Use OAuth on Exchange on-premises without Hybrid Modern Authentication

By: Ingo

Mon, 12 Sep 2022 11:51:41 +0000

In reply to John.

Hi John,
afaik, there shouldn’t be an issue.
Ciao,
Ingo

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By: John

Mon, 12 Sep 2022 11:13:03 +0000

Hi!
If I want to use oAuth, with or without HMA, will I still be able to certificate-based auth besides for Exch 2016/19?

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By: Mark

Thu, 03 Sep 2020 11:40:28 +0000

What version of Exchange did you use in your test?

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By: Carlos

Wed, 12 Aug 2020 16:00:21 +0000

Hi Ingo,

May I know if it is possible to only enable HMA of part of the user in my organisation?

Would like to implement it by phases.

Thank you

Carlos

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By: Ingo

Fri, 15 May 2020 10:53:36 +0000

In reply to Bala.

Hi Bala,
you can check your VDirs by the steps outlined here:
https://docs.microsoft.com/office365/enterprise/configure-exchange-server-for-hybrid-modern-authentication#verify-virtual-directories-are-properly-configured
OAuth should be listed.
Ciao,
Ingo

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By: Bala

Fri, 15 May 2020 10:43:30 +0000

Hey,
Thanks for the blog, if i am having Exchange 2013 (CU19) how can i enable OAUTH for my clients. Is the HMA feature in Exchange 2013 (CU19) automatically accepts OAUTH tokens? or i need to run any scripts?

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By: Ingo

Wed, 06 May 2020 13:18:44 +0000

In reply to Carol Chisholm.

Hi Carol,
I think it’s going to be hard to remove the Hybrid config. But what you can do is removing the on-premises namespaces from the config.
Ciao,
Ingo

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By: Carol Chisholm

Mon, 04 May 2020 14:03:18 +0000

I think I have this partly implemented and would like to remove it. Any instructions or should I just work backwards?

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By: Ingo

Thu, 30 Apr 2020 14:27:14 +0000

In reply to Kiran P.

Hi Kiran,
these clients doesn’t understand that the server is offering Modern Auth and will ignore it as they don’t understand. That’s why you need to enable MA on 2013 clients.
Short answer:
Nothing for these clients.
Ciao,
Ingo

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By: Kiran P

Thu, 30 Apr 2020 13:16:06 +0000

Hi ingo,

Whats is the end user impact if we enable HMA. IF organisations have legacy mail clients like outlook 2010,2007 and legacy protocols imap and pop3 configurations?

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