Effect on Outlook clients when changing Forms Based Authentication on OWA and ECP Exchange 2013

Caspar - ABO 281 Reputation points
2023-08-10T14:45:43.74+00:00

Hi,

We are currently migrating a customer from Exchange 2013 to Exchange 2019. But before we actually start the migration I'm fixing some things that I find annoying.

Exchange 2013 works great, no complaints but when users go to the OWA or ECP page using a browser, you don't get the default blue/white logon page but instead you only get a username and password box. Looks very strange. Also when logging of from OWA it tells you to close the browser to end the session.

I believe this has to do with the config of the OWA and ECP virtual directories. I'm told I can switch these to Forms Based Authentication to fix this, however before I do, I need to know for sure if this in any way has an effect on Outlook connections. I have about 200 people that use Outlook without issue and I don't want any surprises...

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Exchange | Exchange Server | Other
Exchange | Exchange Server | Other

A robust email, calendaring, and collaboration platform developed by Microsoft, designed for enterprise-level communication and data management.Miscellaneous topics that do not fit into specific categories.

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

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Answer accepted by question author
Andy David - MVP 160.3K Reputation points MVP Volunteer Moderator
2023-08-10T14:56:25.24+00:00

Nope, that wont affect Outlook clients at all. Its strictly a setting for OWA and EAC access.

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  1. Ceyhun KIRMIZITAS 0 Reputation points Microsoft External Staff
    2026-09-21T21:22:05.2166667+00:00

    Changing the authentication method on the OWA and EAC virtual directories does not affect Outlook MAPI/HTTP connections.

    OWA and EAC authentication settings are only used for browser access.

    If Forms Based Authentication is used, Basic Authentication should also remain enabled because FBA depends on it.

    Microsoft reference: https://learn.microsoft.com/en-us/exchange/plan-and-deploy/post-installation-tasks/disable-basic-authentication-on-exchange-server-virtual-directories

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