I guess it's the Bug again mentioned last sunday to monday... so no point in crying, just hoping that the Dev-Team can track it down this time and kill the bug so this "unexpected" downtimes will not continue anymore. And if not... I hope that you apply a new patch, especially for the DoFF-missions, again before restarting servers.
Man this is a daily occurrence and it's totally frustrating. You get some time with friends and bang the server goes down! You folks need to stop fixing symptoms and get the real problem fixed. I have never been in an online game that has as many down times/server crashes as this game! And I've played many online games.