1) Go to Settings on your iPhone/ iPad


2) Tap Passwords & Accounts


3) Tap Add Account




4) Tap Other


5) Tap Add CalDAV Account




6) Enter the following details for your account: 


 Server: To obtain the server URL may perform the below steps: 


 Login to cPanel -> Email Accounts -> Choose on the Email Account -> Configure Calendars and Contacts ->  Direct URLs for Calendars and Contacts         


 May get the URL from Secure SSL/TLS URLs or Non-SSL/TLS URLs on Calendar


 Username: Full email address 


 Password: Email account password


   


7)Tap Next in the upper right corner to verify the account.


8) Tap Save in the top right corner.