I am having an issue saving excel onto my dropbox folder from an iPad. I cannot duplicate this issue on my computer though. I run into the issue when trying to save an excel for iPad file into a folder. I get the error message: "That file name won't work because it includes invalid characters or it's too long. Please try a different name". I have tried multiples of different names and it still will not work. I find it odd that this is only an issue from the iPad and that I have saved an identical length name 20 minutes before this issue from the iPad. There is no issue uploading the excel sheet into the same folder with the same name from my Mac.