WebDAV keeps asking for password

Nextcloud version : 12.0.3
Operating system and version : CentOS 7.4.1708 (Core) In combination with Windows Server 2016
Can I reliably replicate it?: Yes, when opening a file from the WebDAV share it keeps asking me for a password.

The issue I'm facing:
When opening a file from the WebDAV share it keeps asking me for a password. Logging off and on results into a disconnected share. I make use of a working LDAP connection.

What I have tried already:
I have enabled basic authentication according to Microsoft’s documentation.
I created a reg key to add an AuthForwardServerList to my NextCloud link.
I have added the website to the trusted websites in IE.
Browsed the forums to find out related problems but none worked or were applicable.

The output of my Nextcloud log: No specific related log

I thank you in advance for helping me out troubleshooting.
Marvin de WijsIT ConsultantAsked:
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Windows Server 2016

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