I'm running calendarserver now as part of 10.9.5 with the server add-on. It's been working great up until I added two new users. I can't get the two new users up on iCal at all, they just throw unknown errors. And I've been having odd errors now with the existing users - delegates that had been working are now throwing errors and one of the workstations can't connect at all on port 8008, even though we're on the same LAN and no firewalls are running. I'm thinking of reinstalling Server again to blow it all away, but I hate to loose existing calendar data. What's the process for backing up and restoring with OS X Server? Thanks! andy 11/3/14 8:24:22.525 AM CalendarAgent[309]: [com.apple.calendar.store.log.caldav.queue] [Got error on refresh, but not rectifying principal because it was manually configured: Error Domain=NSURLErrorDomain Code=-1004 "Could not connect to the server." UserInfo=0x7f7fe4126ed0 {NSUnderlyingError=0x7f7fe4138d20 "Could not connect to the server.", NSErrorFailingURLStringKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/BBA944D0-4458-4621-99..., NSErrorFailingURLKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/BBA944D0-4458-4621-99..., NSLocalizedDescription=Could not connect to the server.}] 11/3/14 8:24:22.530 AM CalendarAgent[309]: [com.apple.calendar.store.log.caldav.queue] [Account refresh failed with error: Error Domain=NSURLErrorDomain Code=-1004 "Could not connect to the server." UserInfo=0x7f7fe2dd8660 {NSUnderlyingError=0x7f7fe88c88a0 "Could not connect to the server.", NSErrorFailingURLStringKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/E1771616-EFAA-4E5C-8C..., NSErrorFailingURLKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/E1771616-EFAA-4E5C-8C..., AccountName=Chris Larson, CalDAVErrFromRefresh=YES, NSLocalizedDescription=Could not connect to the server.}] 11/3/14 8:24:22.531 AM CalendarAgent[309]: [com.apple.calendar.store.log.caldav.queue] [Account refresh failed with error: Error Domain=NSURLErrorDomain Code=-1004 "Could not connect to the server." UserInfo=0x7f7fe88c8430 {NSUnderlyingError=0x7f7fe41739e0 "Could not connect to the server.", NSErrorFailingURLStringKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/007E17F8-28E3-4485-BF..., NSErrorFailingURLKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/007E17F8-28E3-4485-BF..., AccountName=Group Calendar, CalDAVErrFromRefresh=YES, NSLocalizedDescription=Could not connect to the server.}] 11/3/14 8:24:22.531 AM CalendarAgent[309]: [com.apple.calendar.store.log.caldav.queue] [Account refresh failed with error: Error Domain=NSURLErrorDomain Code=-1004 "Could not connect to the server." UserInfo=0x7f7feb606710 {NSUnderlyingError=0x7f7fe4138d20 "Could not connect to the server.", NSErrorFailingURLStringKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/BBA944D0-4458-4621-99..., NSErrorFailingURLKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/BBA944D0-4458-4621-99..., AccountName=office.nrgsoft.com, CalDAVErrFromRefresh=YES, NSLocalizedDescription=Could not connect to the server.}] 11/3/14 8:24:22.531 AM CalendarAgent[309]: [com.apple.calendar.store.log.caldav.queue] [Account refresh failed with error: Error Domain=NSURLErrorDomain Code=-1004 "Could not connect to the server." UserInfo=0x7f7feb103210 {NSUnderlyingError=0x7f7feb722a60 "Could not connect to the server.", NSErrorFailingURLStringKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/696C18EA-29CE-49A1-A1..., NSErrorFailingURLKey=http://ajk@office.nrgsoft.com:8008/principals/__uids__/696C18EA-29CE-49A1-A1..., AccountName=Eric Buchman, CalDAVErrFromRefresh=YES, NSLocalizedDescription=Could not connect to the server.}] 11/3/14 8:24:22.532 AM CalendarAgent[309]: [com.apple.calendar.store.log.caldav.queue] [Adding [<CalDAVAccountRefreshQueueableOperation: 0x7f7fe7f081b0; Sequence: 0>] to failed operations.] 11/3/14 8:24:22.538 AM CalendarAgent[309]: [com.apple.calendar.store.log.caldav.queue] [Adding [<CalDAVAccountRefreshQueueableOperation: 0x7f7fe2ff4280; Sequence: 0>] to failed operations.] 11/3/14 8:24:22.542 AM CalendarAgent[309]: [com.apple.calendar.store.log.caldav.queue] [Adding [<CalDAVAccountRefreshQueueableOperation: 0x7f7fe2fc0080; Sequence: 0>] to failed operations.] 11/3/14 8:24:22.544 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Group Calendar]] 11/3/14 8:24:22.545 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Eric Buchman]] 11/3/14 8:24:22.546 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Chris Larson]] 11/3/14 8:24:22.570 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [office.nrgsoft.com]] 11/3/14 8:24:22.571 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Group Calendar]] 11/3/14 8:24:22.572 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Eric Buchman]] 11/3/14 8:24:22.572 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Chris Larson]] 11/3/14 8:24:22.589 AM CalendarAgent[309]: [com.apple.calendar.store.log.caldav.queue] [Adding [<CalDAVAccountRefreshQueueableOperation: 0x7f7fea62dab0; Sequence: 0>] to failed operations.] 11/3/14 8:24:22.590 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [office.nrgsoft.com]] 11/3/14 8:24:22.591 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Group Calendar]] 11/3/14 8:24:22.592 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Eric Buchman]] 11/3/14 8:24:22.593 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Chris Larson]] 11/3/14 8:24:22.612 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [office.nrgsoft.com]] 11/3/14 8:24:22.612 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Group Calendar]] 11/3/14 8:24:22.613 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Eric Buchman]] 11/3/14 8:24:22.614 AM Calendar[26326]: [com.apple.calendar.ui.log] [An error exists on principal: [Chris Larson]]