Your company uses Microsoft Teams. You need to configure an auto attendant that will use a Direct Routing phone number to receive incoming calls. Which type of license do you require?

Microsoft 365 E3 includes Teams and some core services, but the Phone System license (or a specific add-on like Virtual User) is separately required for advanced telephony features for resource accounts.

Microsoft 365 Business Standard does not include Phone System capabilities for resource accounts like auto attendants.

The Advanced Communications add-on provides capabilities like custom policy packages and compliance recordings, but it does not license resource accounts for phone numbers; that is covered by Phone System.

Auto attendants and call queues require a Microsoft Teams Phone System Virtual User license for each resource account that needs to make or receive calls, especially when using Direct Routing or Calling Plans. This specific license enables the associated phone number and Phone System features for the resource account.