What it means
An Office macro is executable automation embedded in certain document types. Microsoft marks many downloaded files as coming from the internet and blocks macros by default in supported Office configurations. The macro warning concerns active code, not merely whether text or cells can be edited.
A real-world example
A finance workbook displays useful figures but says macros are blocked. The user can ask for a static export rather than changing security settings to run an unknown script.
What to do
Identify the macro owner and purpose, and route any required automation through an approved IT review and distribution path. Keep blocks in place for unexpected files.
The distinction that matters
A familiar document is not automatically a trusted macro. Some previously trusted or managed files behave differently, so the absence of a warning is not a security verdict. Microsoft documents the internet mark and current default blocking behavior.
Microsoft on internet macros
