{"id":23513,"date":"2026-09-18T11:30:00","date_gmt":"2026-09-18T11:30:00","guid":{"rendered":"https:\/\/sortedkeys.com\/?p=23513"},"modified":"2026-09-09T16:40:04","modified_gmt":"2026-09-09T16:40:04","slug":"corrigir-erro-18456-sql-server-falha-inicio-sessao-sa","status":"publish","type":"post","link":"https:\/\/sortedkeys.com\/pt-pt\/corrigir-erro-18456-sql-server-falha-inicio-sessao-sa\/","title":{"rendered":"Corrigir Erro 18456 no SQL Server: &#8220;Falha no In\u00edcio de Sess\u00e3o do Utilizador &#8216;sa'&#8221;"},"content":{"rendered":"\n<div class=\"sk-blog-content\" style=\"font-family: 'Inter', sans-serif; color: #334155; line-height: 1.7; font-size: 16px;\">\n    <p>O <strong>Erro 18456 do Microsoft SQL Server<\/strong> com a indica\u00e7\u00e3o <em>&#8220;Falha no in\u00edcio de sess\u00e3o do utilizador &#8216;sa'&#8221;<\/em> indica que o motor de base de dados recusou a autentica\u00e7\u00e3o. Ao verificar os registos de erros no SSMS, o c\u00f3digo de estado esclarece a causa: o <strong>Estado 58<\/strong> revela que o SQL Server est\u00e1 configurado apenas para Autentica\u00e7\u00e3o do Windows, enquanto o <strong>Estado 8<\/strong> aponta para uma palavra-passe errada. Ative o Modo Misto nas propriedades do servidor e redefina as permiss\u00f5es da conta &#8216;sa&#8217;.<\/p>\n    <div style=\"background-color: #0f172a; color: #f8fafc; padding: 20px; border-radius: 8px; font-family: monospace; margin: 25px 0;\">\n        <span style=\"color: #14b8a6; font-weight: bold;\">&#8212; T-SQL: Redefinir palavra-passe e ativar utilizador &#8216;sa&#8217;:<\/span><br>\n        ALTER LOGIN [sa] WITH PASSWORD = &#8216;NovaPalavraPasseForte2026!&#8217;, CHECK_POLICY = OFF;<br>\n        ALTER LOGIN [sa] ENABLE;<br>\n        GO\n    <\/div>\n    <div style=\"background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); padding: 30px; border-radius: 12px; margin: 40px 0; border: 1px solid #334155; text-align: center;\">\n        <h3 style=\"color: #ffffff; font-family: 'Montserrat', sans-serif; font-size: 22px; font-weight: 800; margin-top: 0;\">Solu\u00e7\u00f5es de TI Empresariais SortedKeys<\/h3>\n        <p style=\"color: #94a3b8; font-size: 15px; max-width: 600px; margin: 0 auto 20px auto;\">Compre software original com fatura profissional e suporte de ativa\u00e7\u00e3o dedicado.<\/p>\n        <a href=\"https:\/\/sortedkeys.com\/pt-pt\/produto\/windows-server-2022-standard\/\" style=\"background-color: #14b8a6; color: #0f172a; font-weight: 800; padding: 14px 28px; border-radius: 8px; text-decoration: none; display: inline-block; box-shadow: 0 4px 0 #0d9488;\">Explorar Produtos Servidor \u2192<\/a>\n    <\/div>\n<\/div>\n\n<!-- CRITICAL: STYLESHEET OUTSIDE DIV -->\n<style>\n\/* Force WordPress Featured Image to Shrink *\/\nbody.single-post img.wp-post-image, \nbody.single-post .entry-header img, \nbody.single-post .wd-post-thumb img,\nbody.single-post figure.entry-thumbnail img,\nbody.single-post .article-inner > header img {\n    max-height: 450px !important;\n    width: auto !important;\n    margin: 0 auto 30px auto !important;\n    display: block !important;\n    border-radius: 12px !important;\n    object-fit: contain !important;\n}\n<\/style>\n","protected":false},"excerpt":{"rendered":"<p>O Erro 18456 do Microsoft SQL Server com a indica\u00e7\u00e3o &#8220;Falha no in\u00edcio de sess\u00e3o do utilizador &#8216;sa&#8217;&#8221; indica que<\/p>\n","protected":false},"author":40,"featured_media":23493,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[964,970],"tags":[1654,1658,1655,1656,1657],"class_list":["post-23513","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-centro-de-ajuda","category-resolucao-de-problemas","tag-erro-sql-server-18456","tag-estado-8-resolucao","tag-falha-login-sa","tag-modo-misto-sql-server","tag-ssms"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Corrigir Erro 18456 no SQL Server Login sa | SortedKeys<\/title>\n<meta name=\"description\" content=\"Recebe o erro 18456 no SQL Server: Falha no in\u00edcio de sess\u00e3o do utilizador &#039;sa&#039;? 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