Compose an email with the subject and body.
For example, specify TOTP Enrollment Link in the Subject and body as follows:
Hi Users, Click here to enroll for the TOTP authenticator using the Desktop OTP tool.
Right click on the preferred text and select Hyperlink.
Specify the encoded link and prefix aaf-otp in Address.
For example, aaf-otp:eyJzZXJ2ZXJfdXJsIjogImFhZnNlcnZlci5jb21wYW55LmNvbSIsICJ0ZW5hbnRfbmFtZSI6Im5ldGlx4oCdLCAiY2F0ZWdvcnlfbmFtZSI6ICJIT01FIn0=
Specify the email address of the preferred users in To then click Send.
User can click the hyperlink to open the Desktop OTP automatically.