Forum Discussion
SharePoint 2010 Authentication Errors
Hee JJ,
I'm not sure if this is something you already checked, as you mentioned you've exhausted all Google searches. But I remember we had something quite alike. For us it happend in office documents (not sure if it was also in WebDav).
Check out this article: https://kb.intermedia.net/article/1668
First part is quite basic, but the last part describing a registry change might help you.
You can also find this in this Microsoft article: https://support.microsoft.com/en-us/help/943280/prompt-for-credentials-when-you-access-webdav-based-fqdn-sites-in-wind
Good luck!
Dear Maarten
Thank you for your assistance. I have checked both links and confirmed. I have added to trusted and Intranet as well as tried the options for the registry. We has the loopback Reg String but not the AuthForwardServerList. I have added but that did not make a difference. The strange part is the it does not give a correlation error. it just serves a black page after 3 attempts. The log file also does not show an error.