The issue is likely because the URL is being inserted into the Description field as plain text. Simply adding a ms-apps-fs:// URL doesn't automatically make it clickable.
I would recommend creating the link as an HTML hyperlink in Power Automate, for example:
If the URL is stored in a variable, you can construct the Description using:
Then use this HTML content in the Email Description/Body.
Also, test the ms-apps-fs:// deep link directly on the target mobile device to confirm that Field Service Mobile is installed and the user is signed in.
If the HTML is still displayed as plain text, check the actual value stored in the Dataverse Email record. If the <a> tag is present there but the received email still shows it as text, then the HTML may be getting stripped/encoded by the email-sending step or email client.
