We have added a new article in Microsoft Exchange Server section. The detail of this article is

Title: How to Regain Access to an Exchange Server 2003 Organization

Purpose: Within this article I will provide a way on how to regain access to an unmanageable Exchange Server 2003 environment where none of the Exchange Server 2003 full administrators will have any access anymore due to a false administrative setting that denies every right to that group.

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