Outlook 2013 and Office 365 - Password prompts

[CHiLL]

We have ADFS and SSO enabled and currently when our users log into Office 365 via Internet Explorer...it doesn't prompt for their credentials as it already knows that they're logged on.

 

However when the user uses Outlook 2013 to access their emails, it prompts for credentials each time Outlook is launched. Is there any way I can prevent these prompts and Outlook will automatically use Windows' credentials instead?

Edited March 14, 2016 by CHiLL

[FN-GM]

Have a look at this thread - http://www.edugeek.net/forums/cloud-services/164806-outlook-password-prompts-office365.html

 

You will need to do the following:

 

Run this command on Exchange Online Powershell - Set-OrganizationConfig -OAuth2ClientProfileEnabled:$true

 

Then I did these reg edits - https://support.office.com/en-gb/article/Enable-Modern-Authentication-for-Office-2013-on-Windows-devices-7dc1c01a-090f-4971-9677-f1b192d6c910?ui=en-US&rs=en-GB&ad=GB

[CHiLL]

Thanks for that, I've been Googling and I'm surprise that thread didn't come up in the results!

 

Even though those changes have been made and the registry keys are in for that user, the password prompt is still appearing.

[FN-GM]

Just so we are on the same page did you do the powershell on Exchange Online?

 

Is the Office software on the machine fully patched. You need to make sure it has the latests updates for this to work.

[CHiLL]

I performed the command via Azure Powershell connected to our Exchange Online.

 

Our WSUS is configured to apply security and critical updates to our Office applications. Other than that, our Office applications do not receive updates.

[FN-GM]

Our WSUS is configured to apply security and critical updates to our Office applications. Other than that, our Office applications do not receive updates.

 

This might be the issue then.

[CHiLL]

This might be the issue then.

Is there a specific update that I'm going to need, or am I going to have to deploy every update to our test client?

[FN-GM]

Is there a specific update that I'm going to need, or am I going to have to deploy every update to our test client?

 

I believe this is the update required - https://blogs.technet.microsoft.com/office_sustained_engineering/2015/03/10/march-2015-office-update-release/