A scheduled Business Report must be saved in a trusted location before opening it.
In Microsoft Office, a trusted location is a folder that contains files you consider safe and reliable.
How to add a trusted location:
Step1.
In your Excel app, click File > Options
Step2.
Click Trust Center > Trust Center Settings > Trusted Locations
Step 3.
Add new location
Step 4.
Click Browse to find the folder, select a folder, and then click ok.
A trusted location cannot be a OneDrive folder.