It's aggravating that there's no longer a Safe Senders list. One of many conveniences that Microsoft keeps taking out. It seems that hundreds of complaints over multiple weeks on one item, such as...

Tried all these steps, location still greyed out.

If all else fails, Everything software can find the file you want instantly. My favorite Search vehicle.

Thank you!:)

Very helpful.

What exactly does that mean? How do you do that?