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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.
We have a few other tricks to try if you're calling Microsoft Office, and if you are already viewing this on a phone or call-capable device, then you can click or tap below to just start a call. 1  Have Microsoft Office call you insteadCall Microsoft Office using our web-phoneDial 800-642-7676 now. If you're already on the phone with Microsoft Office, you may want to look over any tips we have for getting better results.