Forum Discussion
Anyone know what port To Do desktop app uses for sync?
I am using To Do desktop app on Win 10 and it synchronises to my Office 365 account fine when working from home UNTIL I pull up my VPN into the office - it then says unable to sync! I can sync fine ...
I would start with this list https://support.office.com/en-us/article/Office-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2. Make sure the have all of the Required ports open.
Unfortunately ToDo is not on the list, but it may be using one of the existing ports.