Trying to set up a shared calendar on SharePoint. It works for several e-mail accounts, but for several others, they keep getting the Windows Security password prompt in Outlook and it rejects the password, even though I know they are correct because I can log into both businessclass.comcast.com and the SharePoint site over the web just fine. Been through many forum posts and have tried all sorts of permission settings in IE, Outlook, and on SharePoint, to no avail. As far as I can tell, the security settings are identical across the computers that work and those that don't. Any suggestions? Thanks.
Still no fix for this, but I can confirm that it must be something to do with SharePoint/Comcast and not our computers because I can set up multiple users on the same machine and some will work and some won't (and it's consistent across machines).
Unfortunately, Comcast provides no support for SharePoint...and it is useless without this functionality.