ICal Server/caldavd and a non-OD/AD LDAP setup.

I'm trying to get caldavd working on my new Leopard Server install, but I've been hitting a few roadblocks.
The server was upgraded from Tiger, and the upgrader put the new system into "Advanced" mode, so I have Server Admin instead of Server Preferences. I'd like to stay in advanced mode, rather than reinstalling to workgroup mode.
When the server was running Tiger, it was not running an OD server at all, just binding to our existing LDAP infrastructure for user authentication. After the upgrade, it was still in that mode. However, trying to start iCal server got me the "No virtual host" error.
I switched the server to be an OD master, while keeping our own LDAP servers below localhost in the search order. This created the Computers entry I needed, and the iCal server started up.
However, it's still not working. I tried to enable Calendaring for the diradmin user (as a test) and I get the following message when I run caldavd -Xf /etc/caldavd/caldavd.plist:
2008-03-17 15:46:20-0500 [-] [caldav-8009] [OpenDirectoryService] Populated record: <OpenDirectoryRecord[users@058167af-ace8-519a-ac3d-e166498db024(/Search)] 89BD1949-A296-4579-8F66-A1A90052B438(diradmin) 'Directory Administrator'>, with GUID: 89BD1949-A296-4579-8F66-A1A90052B438
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] Traceback (most recent call last):
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/bin/twistd", line 21, in <module>
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] run()
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twisted/scripts/twistd.py", line 27, in run
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] app.run(runApp, ServerOptions)
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twisted/application/app.py", line 379, in run
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] runApp(config)
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twisted/scripts/twistd.py", line 23, in runApp
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] _SomeApplicationRunner(config).run()
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twisted/application/app.py", line 157, in run
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] self.application = self.createOrGetApplication()
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twisted/application/app.py", line 202, in createOrGetApplication
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] ser = plg.makeService(self.config.subOptions)
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twistedcaldav/tap.py", line 593, in makeService
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] service = serviceMethod(options)
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twistedcaldav/tap.py", line 360, in makeService_Slave
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] baseDirectory = directoryClass(**config.DirectoryService['params'])
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twistedcaldav/directory/appleopendirectory.py", line 107, in _init_
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] self.recordsForType(recordType)
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twistedcaldav/directory/appleopendirectory.py", line 392, in recordsForType
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] return self._storage(recordType)["records"]
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twistedcaldav/directory/appleopendirectory.py", line 369, in _storage
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] self.reloadCache(recordType)
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] File "/usr/share/caldavd/lib/python/twistedcaldav/directory/appleopendirectory.py", line 495, in reloadCache
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] if recordShortName in disabled_names or guid in disabled_guids:
2008-03-17 15:46:20-0500 [-] [caldav-8009] [-] TypeError: list objects are unhashable
Here is the output of dscl /Search -read /Users/diradmin:
dsAttrTypeNative:apple-generateduid: 89BD1949-A296-4579-8F66-A1A90052B438
dsAttrTypeNative:apple-serviceslocator: FA7596AD-76CA-4139-B885-83E442E7F8D1:A73D8EC2-76A2-4F61-A4DA-A32ED611A72C:calen dar
dsAttrTypeNative:authAuthority: [snip]
dsAttrTypeNative:cn:
Directory Administrator
dsAttrTypeNative:gidNumber: 20
dsAttrTypeNative:givenName: Directory
dsAttrTypeNative:homeDirectory: /Users/diradmin
dsAttrTypeNative:loginShell: /bin/bash
dsAttrTypeNative:objectClass: inetOrgPerson posixAccount shadowAccount apple-user extensibleObject organizationalPerson top person
dsAttrTypeNative:sn: Administrator
dsAttrTypeNative:uid: diradmin
dsAttrTypeNative:uidNumber: 1000
dsAttrTypeNative:userPassword: ******
AppleMetaNodeLocation: /LDAPv3/127.0.0.1
AuthenticationAuthority: [snip]
FirstName: Directory
GeneratedUID: 89BD1949-A296-4579-8F66-A1A90052B438
LastName: Administrator
NFSHomeDirectory: /Users/diradmin
Password: ******
PrimaryGroupID: 20
RealName:
Directory Administrator
RecordName:
diradmin
Directory Administrator
RecordType: dsRecTypeStandard:Users
ServicesLocator: FA7596AD-76CA-4139-B885-83E442E7F8D1:A73D8EC2-76A2-4F61-A4DA-A32ED611A72C:calen dar
UniqueID: 1000
UserShell: /bin/bash
Does anyone have any suggestions for debugging this issue?
This is, of course, just the first step. My next step is to use Directory Utility to map openldap attributes to opendirectory attributes. That actually seems to be working OK, but I can't know for sure until I get the server working for OD users.
Thanks in advance.
Message was edited by: Ed F
Message was edited by: Ed F

There is something odd about a record the server is trying to load. Can you try this:
1) In Workgroup Manager disable calendaring for ALL users.
2) Restart calendar server and see if it starts up (it should).
3) Create a new user in Workgroup Manager and enable calendaring on that one only.
4) Restart calendar server and see if it starts up.
5) For the existing users, enable calendaring on each one and try and find the one that causes the calendar server to not startup.
6) Once you have identified the problem record, do a dump of its attributes via dscl and post here.

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Ical server caldavd error

hello people,
i suddenly become this error in the logs of ical server, i dont have any idea what it means please help
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011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/method/report_common.py", line 133, in responseForHref
2011-02-11 13:48:34+0100 [-] [caldav-8009] d = propertiesForResource(request, propertyreq, resource, calendar, timezone, isowner)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/method/report_common.py", line 199, in propertyListForResource
2011-02-11 13:48:34+0100 [-] [caldav-8009] return _namedPropertiesForResource(request, prop.children, resource, calendar, timezone, isowner)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 832, in unwindGenerator
2011-02-11 13:48:34+0100 [-] [caldav-8009] return _inlineCallbacks(None, f(*args, **kwargs), Deferred())
2011-02-11 13:48:34+0100 [-] [caldav-8009] --- <exception caught here> ---
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 749, in _inlineCallbacks
2011-02-11 13:48:34+0100 [-] [caldav-8009] result = g.send(result)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/method/report_common.py", line 256, in _namedPropertiesForResource
2011-02-11 13:48:34+0100 [-] [caldav-8009] propvalue = property.elementFromCalendarWithAccessRestrictions(calendar, access, timezone)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/caldavxml.py", line 647, in elementFromCalendarWithAccessRestrictions
2011-02-11 13:48:34+0100 [-] [caldav-8009] return CalendarData.fromCalendar(filtered_calendar)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/caldavxml.py", line 403, in fromCalendar
2011-02-11 13:48:34+0100 [-] [caldav-8009] return clazz(davxml.PCDATAElement(str(calendar)))
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/twistedcaldav/ical.py", line 361, in _str_
2011-02-11 13:48:34+0100 [-] [caldav-8009] def _str_ (self): return self._vobject.serialize()
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/base.py", line 186, in serialize
2011-02-11 13:48:34+0100 [-] [caldav-8009] return behavior.serialize(self, buf, lineLength, validate)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/behavior.py", line 148, in serialize
2011-02-11 13:48:34+0100 [-] [caldav-8009] if validate: cls.validate(obj, raiseException=True)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/behavior.py", line 83, in validate
2011-02-11 13:48:34+0100 [-] [caldav-8009] if not child.validate(raiseException, complainUnrecognized):
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/base.py", line 69, in validate
2011-02-11 13:48:34+0100 [-] [caldav-8009] return self.behavior.validate(self, *args, **kwds)
2011-02-11 13:48:34+0100 [-] [caldav-8009] File "/usr/share/caldavd/lib/python/vobject/icalendar.py", line 989, in validate
2011-02-11 13:48:34+0100 [-] [caldav-8009] raise ValidateError(m)
2011-02-11 13:48:34+0100 [-] [caldav-8009] vobject.base.ValidateError: 'VEVENT components cannot contain both DTEND and DURATION components'
2011-02-11 13:48:34+0100 [-] [caldav-8009]

Another log message:
2007-11-04 12:17:48+0100 [HTTPChannel,0,84.150.186.146] Exception rendering:
2007-11-04 12:17:48+0100 [HTTPChannel,0,84.150.186.146] Unhandled Error
Traceback (most recent call last):
File "/usr/share/caldavd/lib/python/twisted/web2/channel/http.py", line 412, in processRequest
self.request.process()
File "/usr/share/caldavd/lib/python/twisted/web2/server.py", line 291, in process
d.callback(None)
File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 239, in callback
self._startRunCallbacks(result)
File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 304, in _startRunCallbacks
self._runCallbacks()
--- <exception caught here> ---
File "/usr/share/caldavd/lib/python/twisted/internet/defer.py", line 317, in _runCallbacks
self.result = callback(self.result, *args, **kw)
File "/usr/share/caldavd/lib/python/twisted/web2/server.py", line 288, in <lambda>
d.addCallback(lambda res, req: res.renderHTTP(req), self)
File "/usr/share/wikid/lib/python/apple_wlt/UserServer.py", line 81, in renderHTTP
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exceptions.TypeError: 'NoneType' object is unsubscriptable

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Welcome to Apple Discussions,
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iCal Server email invitations - how to test and get this feature working
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At long, long last we have finally got there after about 6 months of fiddling on and off, so I thought I had better post up the process since many have similar issues and it is hard to ascertain what is going on.
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Accepted invites appear as a notification button on the top left hand bar on iCal where you click to acknowledge them and then the attendee is shown as a green circled tick instead of a grey circled ?.
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iCal Server email invitations - how to test and get this feature working
Thanks Apple for introducing this nice little feature into iCal but then completely neglecting to write any sort of useful manual that can explain what to do when it doesn't work after you set it up for the first time.
At long, long last we have finally got there after about 6 months of fiddling on and off, so I thought I had better post up the process since many have similar issues and it is hard to ascertain what is going on.
Using an external email server was just a waste of time and it still wouldn't handle the replies properly even though it was supposed to handle '+addressing'. In the end I set up a special gmail account for the iCal server and finally got it working. I list here the process of configuring and testing the system to check that each little stage is working.
Set up a Gmail account in Apple Mail to access and test in the usual way for any email account (e.g. [email protected].);
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smtp.gmail.com
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Port: 587 [x] Use SSL
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User & Pwd
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send out a test email from Apple Mail to a non-server email address that you can access to check it has been received;
send out a test email from your non-server email account to [email protected] and check that it is received;
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Testing iCal:
I noted that iCal was deleting any emails that arrive in the inBox in Apple Mail as soon as they arrived (this is to be expected);
test that the invites are being sent from iCal by setting an event in iCal and inviting your non-server address (you may not see any sign of this in Apple Mail but you should catch it in the iCal server log and possibly in the Gmail sent mail box);
check that the invite is received at your non-server account and Accept it in iCal on another machine - the reply is automatically sent back;
the replies appear in Apple Mail but are quickly deleted by iCal. But their record for you to see is left in Gmail under 'All Mail';
Accepted invites appear as a notification button on the top left hand bar on iCal where you click to acknowledge them and then the attendee is shown as a green circled tick instead of a grey circled ?.
this shows that iCal invitations are working correctly. Whenever an event is updated, all invitees should be updated by email automatically.
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Anatole
The Error and Access logfile in the Server app under iCal server are very useful in determining any errors. I got lots of imip errors when I didn't quite have the settings right. The port is critical and it won't tell you this is the problem if it fails.

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oh no!
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============================================
H??Date: Thu, 18 Nov 2010 16:42:06 -0600
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H??Reply-To: [email protected]
H??To: [email protected]
H??Message-ID: <[email protected]>
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Message was edited by: emb3dd3d

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thanx for helping.
Message was edited by: emb3dd3d

How do Snow Leopard iCal Clients access a Leopard iCal Server?

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Greetings, Jamil.
Could someone please explain how to set up Snow Leopard clients to a Leopard Server.
Sure. Pretty straight forward if you are the client (server setup is another matter and would not be addressed in this forum).
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We are having an issue with iCal Server where a python process is monopolizing the CPU (70%-95%) to the point everything grinds to a halt. Once iCal is stopped, then started again it will be ok for anywhere from 10 minutes to a few hours before it starts all over again.
caldavd error Log is being bombarded with what looks like every transaction. See example below:
2008-01-07 11:26:46-0600 [-] [caldav-8008] [HTTPChannel,4634,192.168.1.139] PROPFIND /principals/_uids_/BA237A85-F880-4A89-B1C1-F07E72A1508E/ HTTP/1.1
This may be completely unrelated, but the DirectoryService process seems to be running high (35%-40%) as well.
Any help would be greatly appreciated!
Fun Facts:
G5 Xserve - Dual 2.0
4GB RAM
Mac OS 10.5.1 Server
DNS seems to be in working order

Server is running with a FQDN and functioning kerberos. The only thing regarding python twisted framework or close to it is when iCal server starts.
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Log opened.
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] twistd 2.5.0 (/System/Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/ Contents/MacOS/Python 2.5.1) starting up
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] reactor class: <class 'twisted.internet.selectreactor.SelectReactor'>
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Configuring directory service of type: twistedcaldav.directory.appleopendirectory.OpenDirectoryService
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] "Directory service <OpenDirectoryService '/Search': '/Search'> has no GUID; generating service GUID from realm name."
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Configuring SudoDirectoryService with file: /etc/caldavd/sudoers.plist
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Setting up document root at: /Library/CalendarServer/Documents
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Setting up principal collection: <class 'twistedcaldav.directory.principal.DirectoryPrincipalProvisioningResource'>
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Setting up calendar collection: <class 'twistedcaldav.static.CalendarHomeProvisioningFile'>
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Setting up root resource: <class 'twistedcaldav.root.RootResource'>
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Setting up default ACEs on root resource
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Setting up AdminPrincipals
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Setting root ACL
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Configuring authentication for realm: /Search
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Setting up scheme: kerberos
2008-01-07 18:25:37-0600 [-] [caldav-8008] [-] Setting up scheme: digest
2008-01-07 18:25:39-0600 [-] [caldav-8008] [-] Configuring authentication wrapper
2008-01-07 18:25:39-0600 [-] [caldav-8008] [-] Setting up service
2008-01-07 18:25:39-0600 [-] [caldav-8008] [-] Configuring log observer: <twistedcaldav.logging.AMPCommonAccessLoggingObserver object at 0x147a7f0>
2008-01-07 18:25:39-0600 [-] [caldav-8008] [-] Adding server at :8008
2008-01-07 18:25:39-0600 [-] [caldav-8008] [-] twisted.web2.channel.http.HTTPFactory starting on 8008
2008-01-07 18:25:39-0600 [-] [caldav-8008] [-] Starting factory <twisted.web2.channel.http.HTTPFactory instance at 0x146fc10>
2008-01-07 18:25:39-0600 [-] [caldav-8008] [-] set uid/gid 93/93
2008-01-07 18:25:39-0600 [twistedcaldav.logging.AMPLoggingFactory] AMPLoggingProtocol connection established (HOST:UNIXSocket('/var/run/caldavd.sock') PEER:UNIXSocket(''))
2008-01-07 18:25:39-0600 [-] [caldav-8008] [-] AMP connection established (HOST:UNIXSocket(None) PEER:UNIXSocket('/var/run/caldavd.sock'))

Address Book and iCal Server backups

I'm working to implement a company-wide Address Book, iCal, and iChat server via Lion Server where I work, and I've gotten most of the setup figured out (I think), and am approaching the point where I can roll it out to a few users for further testing. However, before I'm allowed to move forward any further w/ it I have to have two means of backing up in place and ready to be rolled out at the same time as the server—so I'm planning on using Time Machine as one so it does the entirety of the server and its data/settings, but they also want me to do one of the Address Book Server and iCal Server databases individually, like back up the folder the data is, so we can, if ever necessary, import the backup databases to another computer, so we at least have the content, if not the full server functionality. And, for obvious reasons, it can't be backed up locally.
So I'm looking for a means of doing this and would love any input anyone has. Ease of use/setup is pretty important as this is my first time setting Server up and I've no programming knowledge. I'm fairly sure I'll be able to find (or write my own, though that's unlikely) or modify and AppleScript that simply copies/duplicates a Finder item, and I know I can have iCal automatically run a script (so I'd just have it run every night at midnight or something), but I have yet to figure out how to get the script to copy the folder to a specified location on a different server (or, for that matter, if it's even possible, though I'm sure it is...right?). But that's not what I'm trying to ask here...though I certainly wouldn't mind if someone had thoughts on it and wanted to share them ! I just really would like to know which folders to back up, since it's not simply making an archive of the local Address Book.app database.
And, since I'm already here writing a post, I'll ask one other question that's been nagging at me: in Server Admin.app, with the server (not the services) selected in the sidebar on the left, the Access pane selected in the primary Server Admin window, and Services selected, and trying to dictate which users/groups can access which services, the user can click the "+" in the lower-left corner of the window where added users would appear, and another window pops up next to the Server Admin window that shows a list of the users (and groups if you click the appropriate button). My question is, why does it show me _krb_anonymous, _krb_changepw, and a total of 81 other items? I understand more or less what they are (in a very general sense), but why are they shown as users? More importantly, do they have to be listed there? Technically I'm probably the only one that's going to be the administrator, and I'll know not to add them or modify them, but I don't want anything related to those items appearing in a directory search in Address Book when I get it set up (as they are showing up now; for instance, one user I created is Sandy, and I have it set to include directory contacts in searches, so on a client machine that is correctly communicating w/ the server (add a user, it appears in a minute on another client machine, and vice versa) if I go to search for that name as soon as I type "s" Sandy, the actual user shows up, but so do five or six other things, all of which are items from the aforementioned list in Server Admin (pretty much anything that has an "s" in it, which of course makes sense)—and that's what I don't want, I don't want the users to search for someone, see something like _krb_anonymous pop up, then think something is screwed up and call me and demand I come fix their computer!).
Any thoughts, suggestions, and such are more than welcome and much appreciated!
Thank you to all...

See the following:
Folders You Can Move to Your new Mac
From the Home folder copy the contents of Documents, Movies, Music, Pictures, and Sites.
In your /Home/Library/ folder:
/Home/Library/Application Support/AddressBook (copy the whole folder)
/Home/Library/Application Support/iCal (copy the whole folder)
Also in /Home/Library/Application Support (copy whatever else you need including folders for any third-party applications)
/Home/Library/Keychains (copy the whole folder)
/Home/Library/Mail (copy the whole folder)
/Home/Library/Preferences/ (copy the whole folder)
/Home /Library/iTunes (copy the whole folder)
/Home /Library/Safari (copy the whole folder)
/Home /Library/Calendars (copy the whole folder)
If you want cookies:
/Home/Library/Cookies/Cookies.plist
/Home/Library/Application Support/WebFoundation/HTTPCookies.plist
For Entourage users:
Entourage is in /Home/Documents/Microsoft User Data
Also in /Home/Library/Preferences/Microsoft
For FireFox:
/Home/Library/Applications Support/FireFox
/Home/Library/Preferences/org.mozilla.firefox.plist
Credit goes Macjack for this information.

Mail, iCal Server and iChat server will not work over VPN

I have an Airport Extreme Base Station at the office running the network. Behind it sits a Mac Mini Snow Leopard server running 10.6.3. The ports necessary for Mail, iCal Server and iChat work fine through that external connection. I can also connect with VPN from my 10.6.3 clients.
HOWEVER, when I connect with the VPN clients, I am suddenly unable to access the Mail, iCal Server, Wiki server and iChat server. All connections time out. I can ping the server and I can do other things that do NOT work on the public Airport like ssh or VNC. ssh and VNC are closed at the airport extreme.
So it's pretty odd. When I'm connected via the VPN, all ports that are forwarded to the Snow Leopard server time out over the VPN.
I've tried various and sundry configurations with the VPN client. This includes trying to send all traffic over the VPN, moving it up in the service order, etc. etc. Nothing fixes it. DNS resolution is working fine, however when I do a wireshark capture of ppp0 traffic, I notice that SSL and TLSv1 handshakes appear to occur on the public IP address instead of the private network IP address... and they're all resets.
Has anyone gotten this to work successfully? Like I said, all ports that are NOT forwarded through the Airport work fine over the VPN, but will not work when connected to the VPN. It's really bizarre.

New data: any ports that are normally forwarded on the Airport Extreme to the Mac Mini server will not work when connected to the VPN.
For instance, if I have imaps/993 forwarded from the Airport Extreme to the Mac Mini, it works fine over the Internet. If I connect to the VPN, I can connect to all OTHER services on the Mac Mini, but Mail, for instance, will not work.

Asking again: any fixes for http:/1.1 300 and 500 errors in iCal-Server?

Hi there
I've set up several OS X servers in the last few months, most of them with ical services up and running. Quite everything works smooth, but most customers experience sooner or later errors like
http:/1.1 300... (mostly with repeating events, which seem to be buggy in iCal&CalDAV already for a long time)
http:/1.1 500...
neither are there any relevant entries in the log, nor does it occur on a regular base - in fact, we can observe these errors all 2 or 3 weeks or so. Stopping an restarting of iCal services usually fixes them. DNS is set up perfectly well, including the SRV-entries.
What about you? Do we just have to live with these errors? Or do I really have to sell Kerio to my customers?
Thanks for any suggestion
Regards
Roman

Hi Roman
I have had a few years setting up and administering various calendar options on Xserve.
The Apple built in iCal server is by far the worst of the lot.
Previous to that we used phpicalendar- http://phpicalendar.net/documentation/index.php/Main_Page
It is a bit dated and does not support the same feature set as the Apple one. It works well though.
Kerio on the other hand is great, works well and is easy to use, apart from accepting invites on iOS devices. Its also a much better mailserver than Apple's one.
Another option is to write a script to run everyday to stop and restart the ical service?

ICal Server/caldavd and a non-OD/AD LDAP setup.

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