Unable to post messages in MS Teams using JIRA Automation

[meenu_hooda]

Hi, 

I tried posting messages on MS teams channel by using JIRA automation action "Send Microsoft Teams message". I referred this 

Use automation with Microsoft Teams | Cloud automation Cloud | Atlassian Support

and created the automation rule. Rule is running successfully but nothing is coming on MS Teams.. SO can you help in understanding what could be the reason for it?