I have installed SOGo version 5.11.2.20250213-1 from nightly builds on
Ubuntu Server 22.04.5.
My SOGo users (SOGoUserSources) are defined locally in Postgres
database table 'sogo_view'.
In 'sogo.conf' I defined my external IMAP server through the
definition of the 'SOGoIMAPServer'
variable. I am testing this installation with these clients configured
as follows:
a. Outlook on Windows 10/11 PC connect SOGo with ActiveSync in order
to receive and send
email with the external IMAP server, read/write the SOGo address
books, read/write the SOGo
calendars
these users can create new calendar events and invite other SOGo
users viewing the
freebusy information of the invited users through the
configuration of the calendar
freebusy URL of Outlook (without any authentication)
b. iPhone users make use of the Mail App configured in IMAP directly
to our IMAP server,
for the address books and calendars the users make use of
caldav/cardav connection
to the SOGo server, users can make appointments inviting other
SOGo users viewing
their freebusy information
c. Android users (we use various manufacturers and models) make use of
Google Mail App
configured in ActiveSync against the SOGo server, emails are
managed by means of the
SOGo/IMAP connection and SOGo address books and calendars are
correctly accessed
calendars are accessed by means of the Google Calendar App and the
address book
by means of the Google Address Book App
The problem we have on Android users (point c) is that the calendar
events are correctly
managed by the App but when we invite some other users their freebusy
information is
shifted one-day later. For example, if a user has an appointment on
Thursday 20 Feb
at 14:00-15:00, the freebusy of that event is shown by the App on
Friday 21 Feb at
14:00-15:00.
We have the same exact problem with Android working with other server
such as Nextcloud,
Kopano and Zimbra. On these servers Android is configured in
ActiveSync implemented with z-push.
We tried to debug this problem logging the communication between
Android and ActiveSync/z-push.
We have the following:
1. Android ask for the freebusy information setting the period range
as follows (8 days of
freebusy)
starttime => 2024-12-29T00:00:00.000Z
endtime => 2025-01-06T00:00:00.000Z
2. z-push contacts the caldav server for appointments in this range
and returns the
'<ResolveRecipients:MergedFreeBusy>' vector with free (0 values)
and busy (2 values)
information (384 chars = 8 days * 24 hours/day * 2 half-hour/hour)
to Android
(in the following example the first hour Dec 29 00:00-01:00 UTC is busy)
220000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000022220000000000000000000000000222222222222222222222222222222222222222222222222000000000000000000002220000000000000000000000000000000000000000000002220000000000000000000000000000000000000000000222000000000000000000000000000000000000000000000000000000000000000000000000000
3. Android shows freebusy information one-day later (in the example
Dec 30 00:00-01:00 UTC)
We were able to solve this problem changing the z-push caldav.php
reading one-day more from the
caldav server (in the example, not from 29 Dec to 05 Jan but from 29
Dec to 06 Jan) and removing
the first day (first 48 chars) of the vector before sending the answer
to Android. In this way
Android shows correctly the freebusy information.
We tested several Android devices with Google Calendar App with
Android/Mail version:
- Android-Mail/2024.11.24.702067492.Release
- Android-Mail/2024.11.10.697731510.Release
In Android we tested also a commercial client named 'Nine'. This
client has its own calendar
with the freebusy feature. With this client the freebusy information
are correctly shown
with SOGo and the other caldav servers.
We suspect that this problem is related with a bug in Android Google
Calendar App.
Obviously Android Google Calendar App with a Gmail account shows
correctly the freebusy
information.
We would like to know if you are aware of this problem and if you have
already a solution
in SOGo.
Thanks for your help.
-- Euse
--- Alessandro Eusebi - EUNet
--- Viale Ciro Menotti, 28 - 41121 Modena
--- Email: aeus...@eunetsrl.it - Cell: 340-5907919
