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Government Org. · Case Study

GCC High SharePoint Migration and Microsoft 365 Secure Collaboration

A government contractor relying on aging on-premises SharePoint needed to move critical business content into Microsoft 365 GCC High. MSPowerhouse assessed the fragile legacy environment, migrated content into SharePoint Online GCC High, and built a phased roadmap for security hardening, MFA, Conditional Access, and intranet modernization.

Client
Name Withheld — Government Contractor / Defense Services
Engagement
2024
Industry
Government Org.
Outcome
GCC High Modernized in cloud
GCC High SharePoint Migration and Microsoft 365 Secure Collaboration

The challenge

  • Aging on-premises SharePoint on outdated infrastructure was no longer reliable to maintain.
  • Content had to land in Microsoft 365 GCC High, where endpoints, tooling, and PowerShell modules differ from commercial M365.
  • The client needed a secure collaboration foundation, not just a file copy.

Our approach

  • Assessed legacy SharePoint content, libraries, and migration constraints against GCC High destination requirements.
  • Phase 1: migrated critical document libraries into SharePoint Online GCC High with content validation.
  • Phase 2: planned MFA, Conditional Access, admin access review, and collaboration governance.
  • Phase 3: defined a roadmap for modern intranet and departmental SharePoint sites.

Results

Migrated
Critical content into GCC High
Reduced
Reliance on legacy on-prem infrastructure
Roadmap
MFA, Conditional Access, intranet modernization

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