Getting this error when opening templates from expd8 and macros confirmed to be working outside expd8. This error might also happen when sending emails
from Expd8.
Add the server name to trusted location settings on word and saved it.
You can view the server name by opening CMD command and type net use.
Copy and paste this and use the format below when adding it to trusted location and enable Allow Trusted Locations on my network
Try opening templates again or send emails from expd8 and see if Microsoft pop up will still appear, if not anymore then it's all good.
NOTE: If that path didn't work and same pop up appears, try the path locations below and see which path the pop up will no longer show up.