Instances occur when you notice that Outlook rules not running automatically and the desired functioning of the email client lacks. In such cases, you can follow the below-mentioned troubleshooting methods to resolve the issue:
1. Rename the Outlook rules. In case the rules have long names, you can edit them to a shorter one to reduce the size of your existing rules.
2. Remove old rules. You can delete the old rules that are no longer in use. This way you can reduce the overall size of your existing rule.
3. Combine the similar rules and delete the unnecessary files. This is how you can reduce the overall size of your rules.