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Calendar items created in iCal and synched with Entourage does not reflect DST

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Introduction:

In this blog I have explained an issue where we see some discrepancies when we use sync services to REPLACE, REPLACE, MERGE data from iCal to Entourage.

Before we start I would also like you to visit https://www.entourage.mvps.org/faq_topic/sync_services_basics.html for Basics of How Sync Services Works.

Issue Description:

When calendar items are created in iCal in Mountain Time and synched with Entourage EWS set to Mountain time (US&Canada) the items are displayed in Entourage one hour earlier between March 14, 2010 to November 7, 2010 (during DST).

Steps to identify the issue:

-Set your Mac OS TimeZone to MST – Denver USA

-Set the default time zone for new events in Entourage calendar preference to GMT -07:00 Mountain Time (US & Canada)

-Turn on TimeZone support in iCal and set it to America/Denver (You can enable TZ in iCal from the advance tab in iCal preferences)

-Enable sync services for calendar

1. Create a recurring meeting in iCal. In my case I have created it starting today 1th March 2010 till 31th March 2010.

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2. Enable Sync Services in Entourage.

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Select the appropriate option for synchronization your data in the above dialog box

Outcome in Entourage after data sync

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Workaround of this issue

At this point in time the only workaround I can think is to recreate the meeting after DST change.