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Solved: How do I fix FortiAuthenticator unable to send SMS message?

By: Author Alex Lim

Posted on  - Last updated:

Categories Troubleshooting

This article describes the situation when FortiAuthenticator is unable to send SMS messages.

The below message is appearing because the username is maybe too long:

Unable to send FTM activation message to xxx. FortiGuard server failed sending SMS because message is too long.

Solved: How do I fix FortiAuthenticator unable to send SMS messages?

Solution

Step 1: Go to System > Administration > Replacement Message.

Step 2: Choose the relevant SMS replacement message section. It can be ‘FortiToken Mobile Activation SMS Message’.

Step 3: Remove some characters from the default replacement message to make it shorter.

Step 4: Attempt to resend the SMS to the intended user.