interoffice

/ˌɪntərˈɔfɪs/
adjective
  1. Occurring or existing between different offices or departments within the same organization.
    • She received an interoffice memo about the new parking policy.
    • Interoffice communication has improved since they started using a shared messaging app.
    • The company uses an interoffice mail system to send documents between branches.
Antonyms