Ms McIntyre, who "abruptly resigned to compete against IBM," was in possession of highly confidential and sensitive information about IBM's diversity strategies, hiring targets, technologies and innovations, IBM said in the lawsuit filed in a New York federal court on Monday.
Microsoft was not immediately available for comment outside regular business hours. Ms McIntyre was not reachable for comment.
Meanwhile, Bloomberg reported that Judge Vincent Briccetti temporarily barred Ms McIntyre from moving to Microsoft.
IBM complained that Ms McIntyre using and disclosing, whether intentionally or not, its confidential and sensitive information would place the company at a competitive disadvantage.
Ms McIntyre was human resources VP and chief diversity office at IBM, according to her LinkedIn profile.
IBM said it sought to enforce Ms McIntyre's non-competition agreement for the 12-month period and recover from her the equity compensation she has forfeited by "violating her contractual duties" to IBM.
IBM's diversity-related trade secrets are not valuable to Microsoft and Ms McIntyre will not be able to use them in her new role, Bloomberg reported citing her lawyers.