You need to create a new holiday rule to set up auto-approval of holiday requests.
First, you'll need to exclude the user from the existing rule:
Step 1: Go to the Main Settings:
Step 2: Click Calendar & Planner:
Step 3: Choose the Event Manager tab
Step 4: Click the number in the Rules row for Holiday
Step 5: Select the edit icon
Step 6: In the 'Exclude people' field, enter the name(s) of the individuals whose holiday requests should be auto-approved:
Step 7: Select 'Next'
Step 8: Select 'Done'
Now that you've excluded the user from the existing rule, you need to set up a new rule:
Step 1: Click the 'Create rule' button:
Step 2: Enter the name of the new rule:
Step 3: In the 'Assign to' field, enter the name(s) of the individuals whose holiday requests should be auto-approved:
Step 4: Ensure request approval switch remains grey:
Step 5: Make sure the rest of the fields match the existing rule:
Step 6: Select 'Done'
Note: This will apply to any future requests. If the user currently has pending requests, these will need to be approved or deleted and re-submitted