Is there a write-up of instructions for how to change the custom rule we created from my extension getting the main line calls to the IVR if I were to go on vacation?
Sounds too specific. You can search in the Admin Portal Guide
https://assets.ringcentral.com/us/guide/mvp_admin_guide.pdf
Imo your best option is to contact support and ask them for help with the setup.
You can also explain all the details in here and I'll be happy to help.
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