Change all accounts IPs question

Hello, im sorry,i get a trouble. i move accounts from the server 1.1.1.1 to 2.2.2.2, because i set dns cluster, when i restore accounts, the domain's ip be change to 2.2.2.2 automatically. now,the server 2.2.2.2 had down over hours, but the dedicated server provider still do not tell me what happen now, i think i may need to point the connection back to old server for the accounts to work. if i want to let the connection back to old ip 1.1.1.1 , how can i update those account's ip on to 1.1.1.1 quickly ? or i need manually check/modify each accounts and domains separately ? thanls