I have the following setup:
Internet -> RH Linux + Apache (Proxy 80, 443) -> RH Linux + Kerio
We have 5 active users on the Kerio box, 2 with PDA's that support OTA sync (Samsung Blackjack). We've had the same setup here for about 1.5 years, and started with v6.3, and have done in-place upgrades through v6.4, v6.4.1 and now v6.5, without problem. We use the webmail, Kerio Outlook Connector and OTA Sync, and all has worked very well. Recently though, we've been having some odd problems.
1) The phones stopped syncing consistently. Our mobile phone company has been having some 'issues', so we attributed it to that for a while.
2) Then, we noticed that we started seeing duplicates of contacts and calendar events. Not every contact or event, but enough to notice. This caused some alarm.
3) Now, after about 3 weeks of chasing rabbit holes, I've finally thought to look in the error log, and below is what I've found:
[24/Apr/2008 17:48:57] FolderGuidIndex.cpp: User user_b trying to access folder '~user_a/INBOX' with GUID '23305e77-02d3-45ea-90af-1da4890fd8bb' without proper rights
[24/Apr/2008 17:48:57] ASyncUtil.cpp: ActiveSyncOpenFolderByGuid: Empty folder name has been returned from guidToFolderPath (Guid: 23305e77-02d3-45ea-90af-1da4890fd8bb)
[24/Apr/2008 17:48:57] ASyncAirSync.cpp: ActiveSyncAirSync::ProcessCollection: Unable to open folder with CollectionId: 23305e77-02d3-45ea-90af-1da4890fd8bb
We haven't had any problems with the Webmail or KOC, but this has me more than a little concerned that it's only a matter of time.
The box said "Requires Windows 98 or better", so I installed Linux
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