company-internal information; internal company information
Refers to information that is shared or kept within a company, not disclosed to outsiders.
You must not leak company-internal information to outsiders.
We plan to update the internal company information system.
社外秘 means 'confidential' or 'company secret', emphasizing that information must not be disclosed outside the company, while 社内情報 is a neutral term for any information circulated internally.
Compound of 社内 (within the company) and 情報 (information).