Oct 26 2017 10:27 AM
Oct 26 2017 10:27 AM
Can someone, please, share their experience in solving the problem with Office applications prompting for credentials? We've got FBA and Windows authentication in the default zone. Everything works fine. FBA works perfectly, Windows authentication works. However, when we are trying to open a Word document - we are presented with a login login page. For the sake of the argument, let's say it's OOB Login page. But we also have a custom login page that behaves exactly the same. When clicking on any Word document (docx), we are prompted with the login page (see screenshot below). That is only half of the problem. The biggest problem is that even if we authenticate one more time, the login page pops up over and over. It does not matter if we login with FBA or Windows. We've tried all sorts of combinations. It just keeps prompting forever.
We can live with Word prompting us from time to time, but after entering credentials we are not logged in. Popup window never disappears. I want to reiterate that this is happening with the OOB login page as well.
More info
Things I've tried
Any help will be greatly appreciated.
Oct 27 2017 01:46 AM
Hi @Deleted,
Please check this article.
The only way to maintain direct-edit functionality and also not be prompted by the Office application is to implement a proxy/firewall server by using Forms Based Authentication together with persistent cookies. For example, you can use an Internet Security and Acceleration (ISA) server or a Forefront Threat Management Gateway.
I've just checked on one of the environments with 2016+FBA and experienced the same endless (3 times, then error) login prompt when opening an office document.
Nov 28 2017 03:12 AM
I can confirm this behaviour!
Can you try setting SuppressModernAuthForOfficeClients setting of the SPSecurityTokenServiceConfig to $true? Seems like this is a starting point. After that, we could open documents the second time when not closing the Office application and edit them.