I am unable to create mssql database for my domain ?

Solution :

I. Check whether you have allocated the Mssql database quota to your domain plan. If it is not allocated you can follow the below procedure

[1] Login into the plesk control panel.

https://servername.com:8443/
or
https://serverip:8443/

[2] Click on Service plans
[3] Choose your plan name
[4] Allocate the resources and click ok

Also check whether you have allocated the Mssql database quota to your domain. If it is not allocated you can follow the below procedure

[1] Login into the plesk control panel and click subscription
[2] Choose your domain name
[3] Click customize and allocate the resources at your end
[3] Click ok