My colleague in another office has invited me to his SkyDrive group. I was signed into my account from school. (My school, UCF, made an agreement with Microsoft to host student email accounts and such, but has since split the Outlook account from other stuff somehow. https://www.secure.net.ucf.edu/KnightsEmailSelfService/FAQ/.)

When I opened the email, I clicked to view the group. I could see the files and have access to anything, except that I couldn't upload. I clicked Join, and it said there was some error. At length, I eventually clicked decline invitation, and from then on I have no access at all to the group, even though my colleague renewed and sent a fresh invite.

Any ideas?