So I done this and it helped
- Select TOOLS
- Select TAKE CUSTOM ACTION
- Select ENTER DEVICE NAMES
- Paste list of servers
- Select OK
- Select the target tab from action
- CTRL A to select all endpoints
- Right click and select VIEW AS GROUP
Now I’ve been able to remove them all from the DB
You can also create an ad-hoc group using this method too which is great (slow but great)