So I had this problem myself and was able to resolve it by deleting the "Allowed Companies" object and opening some stuff in our firewall. A client of mine is now having a similar issue, except no error message is displayed. I didn't see anything in the firewall getting blocked for them either. Here are the steps the client followed:
1. Open Contacts list
2. Click "Edit in Excel"
3. Open the Excel file and "enable content"
4. Window on the right, the excel applet or add-in, shows "Loading". But then it just stays like that.
I don't even think the user was prompted to login, which I know sometimes it prompts me and other times it doesn't, but they didn't get an error or anything, it just gets stuck with "loading" displayed in that window and stays like that. After a little while, the small circular icon that indicates it's actually loading disappears and only the word "loading" remains, so it seems like it's trying to load something, then times out.
If you need more details or screen shots I can provide them. I don't know where else to even begin.
Thank you,
Tanner Ties
