[chriszf]

They had a guest list and all my students were on it. This particular student was also on it, along with a note to exclude her specifically from entering the office.

[nollidge]

That is not at all clear from your post. It sounds like she just wasn't on the list at all.

[unimpressive]

This. I think you may want to add that detail to your post. It's really important context.

[Bill_Dimm]

Is there some reason why they couldn't tell you in advance that there would be a problem with this student, rather than waiting until you got there?

[mnicole]

Ah, I read your post as if you guys literally just showed up and expected to get in. Did they know you were all together?

I think you did the right thing by allowing the rest of the class to attend, but I feel terrible for your student, especially given the push for more women in engineering.