...
Apr 08 20:19:03 sogod [6322]: 127.0.0.1 "REPORT /SOGo/dav/user@domain/Contacts/personal/ HTTP/1.1" 207 125/210 0.008 - - 0
Apr 08 20:19:04 sogod [6321]: <0x0x7f9879907008[SOGoActiveSyncDispatcher]> Sleeping 5 seconds while detecting changes in Ping...
Apr 08 20:19:09 sogod [6321]: <0x0x7f9879907008[SOGoActiveSyncDispatcher]> Sleeping 5 seconds while detecting changes in Ping...
Apr 08 20:19:14 sogod [6321]: <0x0x7f9879907008[SOGoActiveSyncDispatcher]> Sleeping 5 seconds while detecting changes in Ping...
Apr 08 20:19:19 sogod [6321]: <0x0x7f9879907008[SOGoActiveSyncDispatcher]> Sleeping 5 seconds while detecting changes in Ping...
Apr 08 20:19:24 sogod [6321]: <0x0x7f9879907008[SOGoActiveSyncDispatcher]> Sleeping 5 seconds while detecting changes in Ping...
Apr 08 20:19:26 sogod [6322]: 127.0.0.1 "OPTIONS /SOGo/dav/user@domain/ HTTP/1.1" 401 0/0 0.001 - - 0
Apr 08 20:19:26 sogod [6322]: 127.0.0.1 "OPTIONS /SOGo/dav/user@domain/ HTTP/1.1" 200 0/0 0.002 - - 0
Apr 08 20:19:29 sogod [6321]: <0x0x7f9879907008[SOGoActiveSyncDispatcher]> EAS - response for device 12345: <?xml version="1.0"?>
<!DOCTYPE ActiveSync PUBLIC "-//MICROSOFT//DTD ActiveSync//EN" "http://www.microsoft.com/">
<Ping xmlns="Ping:">
 <Status>5</Status>
 <HeartbeatInterval>570</HeartbeatInterval>
</Ping>

Apr 08 20:19:29 sogod [6321]: localhost.localdomain "POST /SOGo/Microsoft-Server-ActiveSync?User=user@domain&DeviceId=12345&DeviceType=iPhone&Cmd=Ping HTTP/1.1" 200 20/187 589.561 - - 0
Apr 08 20:19:33 sogod [6321]: 127.0.0.1 "PROPFIND /SOGo/dav/user@domain/ HTTP/1.1" 207 491/439 0.002 1531 67% 0
Apr 08 20:19:33 sogod [6321]: 127.0.0.1 "PROPFIND /SOGo/dav/user@domain/Contacts/ HTTP/1.1" 207 651/717 0.006 2864 77% 0
Apr 08 20:19:33 sogod [6321]: 127.0.0.1 "PROPPATCH /SOGo/dav/user@domain/Contacts/ HTTP/1.1" 403 232/298 0.001 - - 0
Apr 08 20:19:33 sogod [6321]: 127.0.0.1 "REPORT /SOGo/dav/user@domain/Contacts/personal/ HTTP/1.1" 207 125/210 0.006 - - 0
Apr 08 20:19:53 sogod [6321]: 127.0.0.1 "PROPFIND /SOGo/dav/user@domain/Calendar/ HTTP/1.1" 401 0/2217 0.001 - - 0
Apr 08 20:19:53 sogod [6321]: 127.0.0.1 "PROPFIND /SOGo/dav/user@domain/Calendar/ HTTP/1.1" 207 1442/2217 0.015 10044 85% 0
Apr 08 20:19:53 sogod [6321]: 127.0.0.1 "PROPPATCH /SOGo/dav/user@domain/Calendar/ HTTP/1.1" 403 250/422 0.001 - - 0
Apr 08 20:19:53 sogod [6321]: 127.0.0.1 "PROPPATCH /SOGo/dav/user@domain/Calendar/ HTTP/1.1" 403 254/430 0.002 - - 0
...