> On Apr 21, 2017, at 1:34 PM, Ian Baker <iba...@eem.ca> wrote:
>
> ...
>>> 3) We recently hired some PC user types who are pushing us to move to
>>> Outlook and Exchange for the simple reason that they want to be able to add
>>> attachments to meeting invitations, e.g. meeting agenda. Apparently
>>> Outlook/Exchange can do this. Is this possible using Mac’s Calendar.app
>>> and/or the WebCal client?
>>
>> Attachments are supported in Calendar.app. Select an event, click
>> "Attachments", then "Add attachment". Attachments are not supported in the
>> web client.
>
> Sorry André - color me thick, but I don’t see where to click “Attachments”.
> Here is what I see when I open an event:
> <PastedGraphic-3.png>
> Am I looking in the wrong spot?
Here's what I see:
For some relatively recent release, client and server both switched to a new
mechanism for doing attachments (called "managed attachments"). I'd guess the
reason you aren't offered the option for adding attachments is a version
mismatch between client and server; either the server is too old for the client
or vice versa. I'm pretty sure (but not positive) that newer clients do not
retain the ability to do the older attachments scheme. If the server is new
enough to support managed attachments, this feature should be enabled by
default. You can check by loading a calendar home in a browser, e.g.
https://your-server.example.com/calendars/users/you
<https://your-server.example.com/calendars/users/you> (log in with the same
credentials used for CalDAV). On the resulting page you'll see a bunch of text;
do a find for managed-attachments-server-URL. If it's present, managed
attachments is (are?) enabled.
Support for managed attachments can be disabled on the server, however if you
do this, I'm pretty sure you will break access to any existing attachments
created in the 'managed attachments' style. It may be the case that it's not
possible to move from "managed attachments" back to the older style ("dropbox"
- no, not "Dropbox"). As I recall, the config switch is mostly there to allow
sites to delay the upgrade to managed attachments, but not for going back to
dropbox once the upgrade has happened. You can check for existing attachments
by querying the database; something like:
sudo psql -h /var/run/caldavd/PostgresSocket -U caldav -c "select * from
attachment;"
... and you can see if the server has already performed the one-time upgrade to
managed attachments by querying the 'calendarserver' table - if
MANAGED-ATTACHMENTS is '1', then the attachments upgrade has already occurred.
% sudo psql -h /var/run/caldavd/PostgresSocket -U caldav -c "select * from
calendarserver;"
name | value
--------------------------+-------
CALENDAR-DATAVERSION | 6
ADDRESSBOOK-DATAVERSION | 2
NOTIFICATION-DATAVERSION | 1
MANAGED-ATTACHMENTS | 1
MIN-VALID-REVISION | 29
VERSION | 63
(the above output is from a slightly older-than-current CalendarServer version)
There is support for converting dropbox attachments into managed attachments as
a one-time operation (typically at upgrade time), but not converting in the
other direction. It may be possible to change that 1 to a 0 to allow the server
to re-upgrade attachments, but that is wholly untested.
You can disable managed attachments on the server (and implicitly enable
dropbox attachments) by setting
<!-- Calendar Managed Attachments -->
<key>EnableManagedAttachments</key>
<false/>
in the CalendarServer config. To isolate that change from the rest of the
config (some of which is automatically maintained by the UI), you can create
/Library/Server/Calendar & Contacts/Config/caldavd-user.plist containing:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
"http://www.apple.com/DTDs/PropertyList-1.0.dtd";>
<plist version="1.0">
<dict>
<!-- Calendar Managed Attachments -->
<key>EnableManagedAttachments</key>
<false/>
</dict>
</plist>
... then bounce the service using the GUI switch, or: sudo
calendarserver_config --restart
To reiterate, you would probably have better luck getting everything updated
than trying to do any style of attachments across a sufficiently large version
skew of clients.
-dre_______________________________________________
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