When you create a Resource Account in Teams Admin Center (or via PowerShell), you need to specify whether the Resource Account will be for a Call Queue or an Auto Attendant. Under the hood of Teams, that makes a difference.

Every so often, a customer I’m working with needs to change a Resource Account from an Call Queue to an Auto Attendant, usually to take advantage of schedule that’s present in Auto Attendants. If you need to do this, you can use the Set-CsOnlineApplicationInstance.

First, use Get-CsOnlineApplicationInstance to see what you have

You can tell by the DisplayName field that my first two items are Call Queues, the other three happen to be Auto Attendants.

If I want to change “TestQueue” to be for an Auto Attendant instead, I can do this

Boring, right?

Note that 11cd3e2e-fccb-42ad-ad00-878b93575e07 is the ApplicationID for a Call Queue object, and ce933385-9390-45d1-9512-c8d228074e07 is for Auto Attendants.