Upon checking the logs I found that User is attempting to login with invalid credentials,
![](https://vmwaretrobleshooting.com/wp-content/uploads/2021/04/image.png?w=802)
From Zabbix server credentials was correctly configured.
We can update the password from vCenter server
![](https://vmwaretrobleshooting.com/wp-content/uploads/2021/04/image-1.png?w=254)
Go to – Menu- Administration- Users And Groups- Select Zabbix User- Edit and Update the password. After 5 to 10 minutes, monitoring will be start working.