Q: Why does a message keep showing "The server responded with an error. The request for account "my email address" failed. The server ... Why does a message keep showing "The server responded with an error. The request for account "my email address" failed. The server responded with "400" to operation CalDAVCalendarSplit DualTypeCalendarQueueableOperation. more
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Nov 8, 2015 7:05 AM in response to UKDane2by Brett L,Greetings UKDane2,
Thanks for using the Apple Support Communities!
I understand that you are receiving a server alert for an email address for a Calendar account on your Mac running OS X 10.7 Lion. To troubleshoot this situation, please work through the following steps:
1. Select the Apple logo from the top left corner of your Mac
2. Open System Preferences
3. Open Mail, Contacts & Calendars
4. Select the account for the email address that is given in the alert in the left hand side bar
5. Select the minus (-) sign from the bottom portion of the left hand side bar
*If you do not use this account, you can stop here
6. Add the account back by selecting the plus (+) sign in the left hand sidebar
Further instructions for adding the account can be found in the Set up Mail section from the following article.
Mac Basics: Use Mail on your Mac - Apple Support
Have a great day!
