Nitika Tyagi

• Worked on authentication technologies such as Multi-Factor Authentication (MFA), identity protection, conditional access policies, device registrations, Single Sign-On (SSO), seamless SSO, enterprise applications, and app registrations with different authentication protocols such as SAML, OAuth, and OpenID Connect, Active Directory Federation Services (ADFS), Windows Hello for Business, and application proxy.
• Worked on tenant and domain management, Azure AD roles and administrators, privileged identity management, self-service password reset, Azure role-based access control, B2C and B2B collaborations, Azure Active Directory domain services, Azure AD user and group management, CIAM tenants, identity governance, Azure Key Vault, managed identities, and Azure AD smart lockout.
• Implemented Azure Identity and Access Management (IAM) solutions to ensure secure access control and compliance within the Azure environment.
• Worked on user experience, security, and establishing procedures for detecting, analyzing, and responding to security incidents.
• Implementing backup and disaster recovery plans to mitigate the impact of security incidents and service disruptions.
• Worked on Azure AD Identity Protection to detect and mitigate identity-based risks, such as suspicious sign-in activities, and compromised credentials.
• Worked on synchronization services such as AD Connect, Cloud sync, Password Writeback, Pass Through authentication and Password Hash synchronization methods, Inbound and On-bound provisioning, SCIM provisioning services.
• Worked on third-party federation services such as Okta, Ping, WS-FED, and Google services.
• Administer and continuously improve the use of Microsoft Security services using Security Center, Azure Sentinel, Cloud App Security, Data loss prevention, Advanced Threat Protection.
• Collaborated with application owners and security teams to onboard new applications into the IAM ecosystem, ensuring proper access controls and audit logging.
• Integrated Active Directory and Azure Entra ID with Linux-based systems to ensure consistent identity and access management across platform.

• Supported Exchange Online and Microsoft Server 2019.
• Resolved issues with Outlook, Teams, OneDrive, OneNote, and Office applications.
• Troubleshot SPF, DKIM, and DMARC-related issues.
• Assisted in cloud and hybrid migration.
• Reset MFA and configured Office apps on mobile devices.
• Supported Microsoft Defender and Exchange Online Protection.
• Worked with Jira (Agile Scrum), created Knowledge Base Articles.
• Resolved issues with shared mailboxes, distribution groups, and permissions.
• Used Jira and ServiceNow for ticket/SLA management.

• Supported 140,000 mailboxes in hybrid deployment.
• Handled Exchange Online & Exchange 2016 environments.
• Resolved issues related to mail flow, retention, mailbox quota, permissions, and journaling.
• Assisted global users across NA, EMEA, and APAC.
• Worked closely with Microsoft Premier Support.
• Used ServiceNow for ticket and SLA management.

Project: Nokia (Oct 1, 2018 – Apr 27, 2021)

• Managed 30,000 on-prem mailboxes and Exchange 2010.
• Daily health checks of Exchange, Enterprise Vault, and Skype for Business.
• Performed Enterprise Vault admin tasks and Skype for Business configurations.
• Troubleshot issues related to autodiscover, permissions, spam, NDRs, and Free/Busy.
• Used SolarWinds/SCOM for 24x7 monitoring and LANDesk for ticket handling.