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Thanks. Top Notch. Video and everything. 
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All the calendars in my organization are showing appointments for the last 3 weeks of March to be 1 hour ahead. The appointments before and after these dates are fine. Any ideas where I can address this issue? We use Exchange 2003 in a 2003 AD environment.
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All the calendars in my organization are showing appointments for the last 3 weeks of March to be 1 hour ahead. The appointments before and after these dates are fine. Any ideas where I can address this issue? We use Exchange 2003 in a 2003 AD environment.

Appointments in the last 3 weeks of March are ahead by one hour?

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.