If there are no accounts in Preferences and "Use this account" checkbox is enabled, checking and unchecking it will not affect anything.
If there are no accounts in Preferences and "Use this account" checkbox is enabled, checking and unchecking it will not affect anything.

martinkero/Telephone,inz/Telephone,mralexgray/SwitchBoard,nriley/Telephone,mobdim/Telephone,thinkski/Telephone,einfallstoll/Telephone,thierryc/Telephone