I have a few laptops (Windows 10 Pro, Office 2016). Outlook with 2 accounts and with same email address: 1 – Exchange 2010 Server on local network, 2 – POP3 External, hosted by Internet provider’s mail server. Exchange 2010 is not accessible from outside. When traveling outside the company network, people are using POP3 account for sending and receiving emails, exchange shows as it’s not connected. A few month ago on all laptops when outside the company and outlook is opened, a Windows Security popups from time to time asking for user name and password. I understand this is because outlook is not connected to exchange server. How can I set outlook or Exchange to not try to connect when outside the network. Playing with Autodiscover in Group Policy did not solve the problem.