1. Microsoft 365 Documentation. (n.d.). Get help or support for Microsoft 365 for business. Microsoft Learn. Retrieved from https://learn.microsoft.com/en-us/microsoft-365/admin/get-help-support
Reference for C: In the "Get help in the Microsoft 365 admin center" section
Step 3 states: "In the Need help? pane
tell us about your issue. We'll show you some solutions to common issues..."
Reference for B and D: Step 4 states: "If the suggestions don't help
select Contact Support." Step 5 continues: "Fill in the description
confirm your contact number and email address
choose your preferred contact method
and then select Contact me." This confirms both email and phone callback as contact methods.
2. Microsoft 365 Documentation. (n.d.). Contact support for business products - Admin Help. Microsoft Learn. Retrieved from https://learn.microsoft.com/en-us/microsoft-365/admin/contact-support-for-business-products
Reference for B
C
and D: Under the "Online support" section
the process is described: "If you can't solve your issue with our self-help solutions
you can start a service request... Provide a description of your issue
and your contact information. We'll call you or respond to your email..." This corroborates the self-help step (C) and the email (B) and phone callback (D) options.