Teams calling works internally but not to outside lines
Phone System add-on only gives PBX function. External calling needs Calling Plan or Direct Routing too.
Try this first
- 1Check if Phone System already in M365 E5
- 2Otherwise: buy Phone System per user who actually calls
- 3Choose Calling Plan (Microsoft) or Direct Routing (own SIP)
- 4Assign numbers in Teams Admin Center
When to bring us in
For hybrid setup: request SIP trunk quote from telecom partner.
See also
- New hire has an account but cannot reach Outlook or TeamsAn M365 account without a license is an empty shell. Assigning takes a few clicks, but picking the right plan pays off long-term.
- Employee left, but their email must be retainedPulling the license straight away starts a 30-day timer on the mailbox. The right route keeps access to the mail without paying for the license.
- We pay for licenses nobody usesBetween leavers, duplicate plans, and test accounts there is often 10-20% wasted license spend. A usage report exposes it fast.
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