We are migrating from Exchange 2010 to 2013. WE have a mix of Win7/Office 2010 and Win10/Office 2013 in our environment. After the initial setup, when we move a user who is using Win10/Office2013 from Exchange 2010 to 2013, it works fine. All URLs are pointed towards the load balancer (KEMP) and the user feels no difference. But if the same user is using Win7/Outlook 2010, it does nothing and Outlook stays in disconnected mode. If we try and recreate Outlook profile, Outlook does not open and instead it gives the error, "cannot open your default email folders. you must connect to microsoft exchange with the current profile before you can synchronize your folders with your outlook data file"
Office 2010 is running on the latest version of SP2, all updates are installed. We even moved the PC outside WSUS to get any additional updates. Any help will be appreciated.