No notifications when agent is replying to customer after migration

[DATPROF]

After I migrated my service desk project from on premise to cloud, it's not sending email notifications when an agent add's a comment to a ticket. 

I've validated that "Public comment added" is enabled under Customer Notifications. 

In a newly created service management, notifications are send correctly. So it looks like a migration issue. 

[KAGITHALA BABU ANVESH]

Hello @DATPROF ,

Some times user account get locked in Atlassian side. I recently seen some people not getting verification email. once they raises a  support ticket to Atlassian. Atlassian Team is enabling those email id's at their end. Please try once by creating a support ticket.

Thanks,

Kagithala Babu Anvesh