Looking further at the log, it looks like the permission issue is 
preventing the client from receiving the full response from the 
server, which is probably the cause of this issue. I would double 
check the user's permissions to the Horde application, the Kronolith 
application. as well as all the calendars that are being requested.

This error is usually do to some activesync message/command being sent 
to the client that it does not recognize or understand so it sends the 
previous synckey back again to the server when asking for changes.  I 
can also be due to the client not receiving the response due to some 
networking issue.
Does the sync user have permissions to all the calendars being 
requested in the sync? Not just permissions to the application, but to 
each calendar. Sometimes this error is due to a stale preference in 
Horde indicating which calendars to sync. You can try visiting the 
sync preferences for kronolith and resetting/resaving the value for 
which calendars to synchronize.

Thanks for the hint - after setting the permission I got a litte further :)

However I still have sync issues :-(

What I have done:
1. Added permissions in horde-->permissions to access horde application
2. Remove the device from activesync configuration
3. deleted the .ost file from outlook to restart initialization, due 
to sync-id issues referred to in the logs

After reinitializing everything Outlook started to download all the 
messages in all folders - that worked perfectly :)

Then I sent a test message to my mailbox and hoped that it'll sync 
also - but it didn't.

Skimming through the logs I found two issues:

########################################################################################
[8391][2022-01-23T07:39:48+00:00] NOTICE: STATE: Error saving state, 
checking if this is due to previous synckey 
{61ed0020-a9b8-4f22-a59c-20c59f45fb64}10 not being accepted by client.
[8391][2022-01-23T07:39:48+00:00] O:   </Folder>
[8391][2022-01-23T07:39:48+00:00] >>>: Collection output peak memory 
usage: 2097152
[8391][2022-01-23T07:39:48+00:00] INFO: COLLECTIONS: Initializing 
state for collection: @Calendar@, synckey: 
{61ed0020-1d04-43e2-b600-20c59f45fb64}2
[8391][2022-01-23T07:39:48+00:00] >>>: STATE: Loading state for 
synckey {61ed0020-1d04-43e2-b600-20c59f45fb64}2
[8391][2022-01-23T07:39:48+00:00] >>>: STATE: Initializing message 
diff engine for A00722152 (@Calendar@)
[8391][2022-01-23T07:39:48+00:00] >>>: 
Horde_Core_ActiveSync_Driver::getSyncStamp(@Calendar@, 1259);
[8391][2022-01-23T08:39:48+01:00] >>>: STATE: Using SYNCSTAMP 1259 for 
A00722152.
[8391][2022-01-23T08:39:48+01:00] >>>: 
Horde_Core_ActiveSync_Driver::getServerChanges(@Calendar@, 1259, 1259, 
0, 0, 1, 100, )
[8391][2022-01-23T08:39:48+01:00] >>>: Fetching changes for calendar 
using MODSEQ.
[8391][2022-01-23T08:39:48+01:00] >>>: Polling for SOFTDELETE items in 
calendar collection
[8391][2022-01-23T08:39:48+01:00] ERR: Permission Denied
[8389][2022-01-23T07:39:48+00:00] INFO: 
----------Horde_Core_ActiveSync_Driver::authenticate() attempt for 
Stefan@graf-online.me----------
[8389][2022-01-23T07:39:48+00:00] INFO: ----------PING request 
received for user Stefan@graf-online.me
[8389][2022-01-23T07:39:48+00:00] >>>: STATE: Device entry exists for 
4C7CB7925B3442B59E878E5CC56280B4, updating userAgent, version, and 
supported.
[8389][2022-01-23T07:39:48+00:00] INFO: ----------Request being 
handled for device: 4C7CB7925B3442B59E878E5CC56280B4, of type: 
WindowsOutlook15, supporting protocol version: 14.0, using 
Horde_ActiveSync v2.41.5
###########################################################################################

1. There is an issue with the STATE as it cant be saved due to the client
2. There is a Permission Denied error in the calendar area


I the added permissions for kronolith in the horde 
configuration-->permissions section. But this didn't help.

Any suggestions what is missing?

The attached log ist the full log of the sync attempt of outlook - 
starting right at the beginning and repeats where it got the issues.

Thanks for your support!

BR
Stefan

Yes. This:

[4319][2021-12-19T09:14:18+00:00] ERR: User Stefan@graf-online.me is 
not authorized for Horde (Host: p5b2a4192.dip0.t-ipconnect.de).

indicates that the specified user does not have permissions set for 
the "Horde" application in admin->permissions. This is required for 
ActiveSync to work.
Does your horde use bare usernames or email addresses when logging in 
via the web UI?

Got the logs now and attache the respecitve one here.

Look like there is an authorization issue with my account?

Interestingly - my account works with ActiveSync on my mobile phone.

Set the full path to the folder that should contain your logs in 
$conf['activesync']['logging']['path']  and make sure it is writable 
by the webserver.

I just tried to get the logs and doublechecked the configuration in 
horde config.

Activesync is configured to log detailed on a per device base.

Unfortunately there are not showing up any logs in the confugred folder.

I tried to change the debug level in the horde log to debug but this 
changed only the amount of messages in syslog but not giving me any 
logfiles for activesync.

any idea to get these log files enabled?

Thanks
Stefan

Sorry, I mean Horde's activesync log for that device. You enable them 
in the horde config.


Hi,

Hi,
I can get you the logs over the weekend and upload it here.
Right now I have no idea how to get these logs from Outlook but I'll 
find out :)

Autodiscover in deet need to work via O365 which actually breaks it. 
That makes configuring the profile a bit tricky but there are some 
workarounds available.

I would need to see the activesync logs for the devices that are 
exhibiting this issue. I CAN tell you that I have pretty much given up 
on getting Outlook to work flawlessly with Activesync as Microsoft 
seems to continuously change how Outlook behaves with it.  I'm 
surprised you were able to get that far, to be honest, as last I 
checked the autodiscovery process that Outlook now uses requires it to 
go through O365.

Hi,
I am running Horde 5.2.22 with ActiveSync enabled.

On a brand new MS Surface (Win 11) with Office 365 (most up to date 
Outlook version).

Outlook is configured to sync with Exchange Server and the initial 
download of all messages works fine. But after rebooting the machine 
Outlook does not fully reconnect to ActiveSync. There is actually no 
error message in Outlook - but the status shows that it is connected 
to the server and is waiting for his response.

So it look like that the baisc connection is fully working but some 
service on the server does not respond propperly and Outlook does not 
sync anything.

I can't believe that this is a issue in the connector but most likely 
in my configuration. Does  anyone have an idea which settings / 
configuration I should double check?

Thanks
Stefan