• Patch Lady – Office 365 prioritization

    Posted on December 9, 2018 at 22:57 CST by • Comment in the Forums

    Recently Office 365/Outlook on click to run has made a change in behavior… as noted on Office uservoice…

    After the release of 16.0.6741.2017, the Click 2 Run (C2R) version of the Outlook client for the PC is prioritising O365 for Autodiscover queries above all other Autodiscover methods (SCP, HTTPS root domain etc).

    This causes problems for customers who aren’t using O365 for mail service, especially if either of these conditions are true:

    1. The user has a mailbox in the O365 service which is not being used. This can occur if the user has inadvertently had an Exchange license assigned.
    2. The user has a personal Office subscription but has used their business email address to configure it.

    Outlook prompts the user to login, but logging in will fail as it’s effectively requesting credentials against the O365 service.

    This behaviour also breaks the experience for existing profiles, not just newly created ones.

    The “workaround” we have is to add a registry change to end users PC to bypass the O365 endpoints. From this article: https://support.microsoft.com/en-gb/help/2212902/unexpected-autodiscover-behavior-when-you-have-registry-settings-under

    This property needs to be set to a DWORD value of 1: ExcludeExplicitO365Endpoint

    This workaround is hard to manage, client specific, and will need to be reverted if the customer ever does in fact move to O365 so that the Direct Connect method can work again.

    My suggestion would be to re-consider this change and how Autodiscover may work more intelligently going forwards.

     

    The request was made to put the behavior back to what it was.

    The response:

    We cannot fulfil this request as we will continue to optimize for the Office 365 experience. The supported implementation of Autodiscover is documented here, https://support.microsoft.com/en-us/help/3211279. Any ongoing changes and improvements will be documented in the article. We appreciate your feedback and take every request with consideration, whether we can move forward with it or not.
    -Outlook Team

     

    If you are running Office 365 they assume that you are using Exchange in the cloud even if you aren’t.  And if you are, and don’t like the new behavior… tough cookies.

    Office Patches/Security ,
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