It is important to look at the formats used to enter and display telephone numbers. MS Teams-IP Office integration involves different interfaces which differ in how they display the same number.
Interface |
Telephone Number and Extension |
Telephone Number Only |
Extension Only |
Azure AD Admin Portal |
+441632768402 x402
|
+441632768402
|
x402
|
441632768402 x402
|
441632768402
|
Teams Admin Portal |
tel:441632768402;ext=402
|
tel:441632768402
|
402
|
IP Office Admin Menu |
MS Teams URI |
441632768000;ext=402
|
441632768402
|
+402
|
System Directory Number |
441632768402-402
|
441632768402
|
+402
|
MS Teams Client |
(1632) 768 8402 extn 402
|
(1632) 768 8402
|
+402
|
IP Office SIP URI[1] |
+441632768402;ext=402
|
+441632768402
|
– |
The IP Office also adds the required protocol prefix and domain/port suffix elements (for example sip:+441632768402;ext=402@sip.pstnhub.microsoft.com:5061).
