Calendar publishing interval for Outlook. What server settings are needed for the frequency of synchronization?

Question

Calendar

I'm developing my own version of a WebDav server to synchronize calendars. For Outlook, all the parameters it needs are transmitted, the server is fully emulated, so the calendars are loaded successfully. But I need to understand where Outlook takes this setting from, the default is 1 hour.

This setting can be configured from Outlook itself, but I need to do it from the server.
Here's what we managed to get with the help of Wireshark
What Outlook sends to the server:

PROPFIND /path/to/url HTTP/1.1
X-Office-Version: 15.0.4771
Depth: 1
Content-Type: text/xml
User-Agent: Microsoft Office/15.0 (Windows NT 6.3; Microsoft Outlook 15.0.4771; Pro)
Host: example.com
Content-Length: 114
Connection: Keep-Alive
Cache-Control: no-cache

<?xml version="1.0" encoding="utf-8" ?> <D:propfind xmlns:D="DAV:"><D:prop><D:resourcetype/></D:prop></D:propfind>

What he gets in return

HTTP/1.1 207 Multi Status
Content-Type: text/xml
Server: Microsoft-IIS/8.5
X-Powered-By: ASP.NET
DLYA_MIHI: Nu i huli ti tut hotel uvidet?
Date: Tue, 15 Dec 2015 17:13:25 GMT
Content-Length: 1375
 
<?xml version="1.0" encoding="utf-8"?><D:multistatus xmlns:D="DAV:"><D:response><D:href>http://94.19.227.93/</D:href><D:propstat><D:status>HTTP/1.1 200 OK</D:status><D:prop><D:resourcetype><D:collection/></D:resourcetype></D:prop></D:propstat></D:response><D:response><D:href>http://94.19.227.93/aspnet_client/</D:href><D:propstat><D:status>HTTP/1.1 200 OK</D:status><D:prop><D:resourcetype><D:collection/></D:resourcetype></D:prop></D:propstat></D:response><D:response><D:href>http://94.19.227.93/dav/</D:href><D:propstat><D:status>HTTP/1.1 200 OK</D:status><D:prop><D:resourcetype><D:collection/></D:resourcetype></D:prop></D:propstat></D:response><D:response><D:href>http://94.19.227.93/iis-85.png</D:href><D:propstat><D:status>HTTP/1.1 200 OK</D:status><D:prop><D:resourcetype/></D:prop></D:propstat></D:response><D:response><D:href>http://94.19.227.93/iisstart.htm</D:href><D:propstat><D:status>HTTP/1.1 200 OK</D:status><D:prop><D:resourcetype/></D:prop></D:propstat></D:response><D:response><D:href>http://94.19.227.93/office%20activate/</D:href><D:propstat><D:status>HTTP/1.1 200 OK</D:status><D:prop><D:resourcetype><D:collection/></D:resourcetype></D:prop></D:propstat></D:response><D:response><D:href>http://94.19.227.93/web.config</D:href><D:propstat><D:status>HTTP/1.1 200 OK</D:status><D:prop><D:resourcetype/></D:prop></D:propstat></D:response></D:multistatus>

Full version here

Answer 1

DLYA_MIHI: Nu i huli ti tut hotel uvidet?

Neighing :)
Install the Administrative Templates for GPO from your office edition and see where this parameter is written (it is there) In my opinion, HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\Outlook\Options\ is
written somewhere here