This may be obvious, but any company that uses Microsoft Teams for internal communication can more easily use the platform also for external communication. This also means less need for a separate telephone exchange (and all related costs) and better integration between systems.
Limited internal knowledge
Any company with a smaller IT team (or if it does not exist at all) may need external support when considering using Teams as a PBX. Experienced providers (such as 3S) can step by step manage your account and basically install Direct Routing for you.
The desire for more flexibility than Microsoft connections
Using Direct Routing, especially for any company that makes a reasonable number of outgoing calls (and even more so if they are international), becomes an obvious choice.
Real unified communication
The idea of using Teams as a virtual headquarters is a huge step forward for companies that like the idea of Unified Communications – combining all internal and external communication into one closely related system.
Choosing your own supplier
Direct Routing means integration with a third party, which can also be a positive aspect. Choosing the right supplier like 3S can allow you to focus on your own business. The provider takes care of service quality, configuration and engineering expertise.
Switching to Teams as a telephone exchange does not mean losing old numbers. Existing numbers are retained alongside new direct numbers.