Why after using Jump Desktop do I find it impossible to access my Outlook email?

After using Jump Desktop I can no longer access my Outlook email on my latest version iPad through my Internet service provider. This peculiarity resolves itself over a lengthy period of time. Interestingly, if I switch ISPs at the location (for example, I have a Wi-Fi hotspot on my phone I can switch to), I can access the email through that ISP immediately. Very strange. Ideas?