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We currently have a split work force in a SMB

Our layout

5 machines running KOC on local network with Win2003server R2 running KerioConnect(most recent update)
7.1.0 patch 1 build 1906

2 machines run via VPN to the server running KOFF (outlook 2007)

The local machines are still running win2000 with Outlook 2000
which I am aware is now unsupported.

The Update to 7.1 (I think) has suddenly started causing massive delays reported by staff when updating public calenders. We run 3 public calenders available to all 7 workstations. The KOC stations are currently reported 2-7 minute delays (ie icon changes to a hourglass) when they try to edit or add an appointment to these calenders.

I have checked network utilization - not really jumping much above 10%. I have checked server loads, not jumping much above 15%.

Server is s dual cpu, xeon dual core. with hd is raid 5 serial atached scsi interface. Server has been scanned for HD errors etc none have been found. The server runs a centralized sophos av interface, as well as Shadowprotect 15minute backups. It does act as a file server for a few small files as well.

Any help adressing this issue would be appreciated .
We have been running kerio successfully without these issues for around 2.5 years.
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