Go to the email/inbox Rules
There are 3 ways to get there:
Select Mail in the left column, then select Rules in the right column
All three options will bring you to the Rules page
Here you can manage your email Rules
Every rule needs at least three things: a name, a condition, and an action. Rules can also contain exceptions to conditions. You can add multiple conditions, actions, and exceptions at each step by choosing Add a condition, Add an action, and Add an exception.
If you don't want any more rules to run after this one does, select the Stop processing more rules check box. For more information, see Stop processing more rules in Outlook.
Press Save to create your rule or Discard to cancel rule creation.
If you'd like to temporarily stop a rule from operating and you don't want to delete it, you can use the toggle next to the rule name to disable or enable the rule.
By default, an inbox rule runs on incoming messages after you've created the rule. To run a rule on existing messages, select next to the rule you want to run.
Rules are applied to incoming messages based on their order in the list. You can change the order of the rules by using the Up or Down arrow next to a rule to move it within the list.
Select next to the rule you want to edit. Make the desired changes and click Save.
Select next to the rule you want to delete.
For more information see
Manage email messages by using rules in Outlook - Microsoft Support