Hi @Rick Angel ,
How did you create the policy? Could you try to delete them directly in the EAC?
- Go to new Exchange admin center, and navigate to Recipients > Groups.
- Click Add naming policy to add prefixes and suffixes to your group names.
- In Edit group naming policy details pane, under Policy section, configure the prefix by selecting either Attribute or Text in the drop-down menu.
- Click Add prefix to add more prefixes.
- For the suffix, in the drop-down menu, select either Attribute or Text, and configure the suffix.
- Click Add suffix to add more prefixes. After you add a prefix and suffix, notice that a preview of the group naming policy is displayed.
- To delete a prefix or suffix from the policy, select X.
- Under Blocked words section, add specific words that you want to block from being used in group names and aliases.
- When you are finished, click Save.
Refer to: Use the new EAC to create a group naming policy
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