Search FastDomain Web Hosting Help Sort by Relevance Most Recent Most Viewed Most Helpful Most Solutions Resource Type Help Content Tagged Mfa - 1 results Office 365: Multi-Factor Authentication Office 365 requires admins users to set up multi-factor authentication before they can use the account. If customers do not set up their multi-factor authentication within 48 hours, they may be locked out. Knowledgebase Article 93,118 views tags: authentication factor mfa microsoft multi office