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Home » Kerio User Forums » Kerio Connect » CalDAV issue with iOS (Get a "Cannot add duplicate CalDAV account" error when trying to add multiple CalDAV Calendars)

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Hello all,

We run Kerio Connect 7.4.3 and recently we've had an issue come up when trying to set up an employee's iPhone with different CalDAV calendars. The employee's iPhone is on the latest iOS update as of this writing, 6.1.2. Also, the server that the Mailserver is located on is running 10.7.4 and is an Intel Mac Mini.

Until about a month ago or so, we have never encountered any issues adding the same CalDAV account to a user's iPhone when trying to attach to/access a calendar that is owned by another user (provided that the employee has been delegated access). For our usual setup process, we will go through the steps in adding the employee's CalDAV account to their mobile device, and depending on how many different calendars they need to access, we will create additional CalDAV accounts with the same user name and password but we will change the user in the "Account URL" section of "Advanced Settings" to the owner of that particular calendar.

However, there is one employee at our company who gets a very peculiar error on his iPhone when trying to add any additional calendars with his CalDAV credentials. After entering the necessary CalDAV account information to set up a new Calendar and clicking "Next" for the server to verify the account info, the mailserver will throw an error message to this user's iPhone that basically reads "There is already a CalDAV account with this information on the device; you can't have duplicate accounts", and it will simply not let me add any additional CalDAV calendars with this user's credentials. Unfortunately, this employee needs to attach to three different calendars and we're currently unable to get his iPhone setup accordingly. We've tested with this user's account across a few different iPhones, and we have been unable to replicate the error and are able to attach to each calendar successfully.

We realize that this isn't an issue affecting us globally, but we were curious if you had any thoughts on why the Mailserver would be throwing that error on only one device? Any help is greatly appreciated. Thanks!
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