Go to Settings on your iPhone and click on Mail.

Click on Accounts.

Select Add Account.

Press Other.

Now click on Add CalDAV-Account.

As Server enter the name of the server. For example groupware.example.com

As Username enter the mail address you have received from us. For example max.muster@example.com.

As password enter the password we gave you.

As description, enter a description which is later used to identify this account.

Press Next.

Now you can decide which functions you would like to synchronise.

Click on Save.

Your calendar is now synchronised on your phone.