office telephone activation number
To activate your product over the telephone, use one of the following numbers: 1  Windows activation: (888) 571-2048. 2  Microsoft Office activation (United States only): (888) 652-2342. 3  TTY number: (800) 718-1599.  If you are an international customer, find the telephone number from the following list: Country/region. Volume License Keys only toll call.