There's no way to rename it once it's been made
The closest you can get would be to Clone the report with the nem name and you can then delete the existing report
If you do this, you would just need to go through the process again of sharing it and/or setting up the report schedule if applicable
Is it possible to rename an Insight report?
An Insight report was incorrectly named or needs to be re-named, is it possible to rename it?
C
Written by Charlotte Alderson