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“After changing the SQL Server service account
information in Control Panel, you must also change the SQL Server
service account in SQL Server Enterprise Manager.This allows the
service account information for Microsoft Search service to remain
synchronized as well. Important:Although the Microsoft Search
service is always assigned to the local system account, the full-text
search engine tracks the SQL Server service account in
Windows.Full-text search and failover clustering are not available if
Windows password changes are not reset using SQL Server Enterprise
Manager.”
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