When enabling a user to Microsoft Teams Direct Routing (let's say with a phone number - DDI "+44zzzzzzzzzz") you could ...
Microsoft Teams – Direct Routing: Error “Filter failed to return unique result” (duplicated phone number – duplicated DDI or duplicated DID)Microsoft Teams – Direct Routing: Error “Filter failed to return unique result” (duplicated phone number – duplicated DDI or duplicated DID)
![](https://modern-workplace.uk/wp-content/uploads/2021/10/DuplicatedDDIError.jpg)