It said the machine would be the "smallest Xbox ever".
The firm's UK, US and French Twitter accounts are among those to have subsequently confirmed local launch dates of 10 November.
Company watchers have said the advertised price is significantly lower than had been expected.
Microsoft has said the machine is set to cost £250/$299/€249. It is £50 more than the lowest-priced version of the firm's existing Xbox One range.
The company has yet to give a launch date or price for the larger and presumably more powerful Xbox Series X.