Short answer:
You can add a Microsoft Teams link to any field (such as Mobile or Email) by inserting a sip:((Email)) link using the link tool in the signature editor.
This guide explains how to add a Microsoft Teams call link to a field in your email signature. In this example, the link is added to the Mobile Phone field.
Step-by-step: Add Microsoft Teams link
- Select the field
Highlight the field where you want to add the Teams link (e.g., Mobile Phone). - Insert a link
Click the Link icon in the editor toolbar.
- Configure the link
In the Link Infotab:- Set Link Type to URL
- Set Protocol to <other>
- Enter the following in the URL field:
sip:((Email))
Click OK to save. Then click OK again to apply the changes.
Result
When a recipient clicks the linked field in your email signature, their device will prompt them to choose an application (such as Microsoft Teams) to handle the call.

Tip
You can apply the same method to other fields, such as Email or Direct Phone, depending on how you want users to initiate contact.
