Adobe products, like Acrobat DC and Acrobat Reader DC, should NOT download updates when Internet access is established through a metered connection.

When Adobe products download updates in the background through a metered connection, the data limit is reached in a snap and it's not possible to continue working for the rest of the month (depending on contract with the Internet provider) unless new, very expensive Internet allotment is bought.

(https://support.microsoft.com/en-us/help/4028458/windows-metered-connections-in-windows-10)