Full Report
Everything you need to know about Microsoft's authentication control, Granular Delegated Admin Privileges (GDAP).
Analysis Summary
# Best Practices: Microsoft Granular Delegated Admin Privileges (GDAP)
## Overview
These practices address the security risks associated with the legacy Delegated Admin Privileges (DAP) model. By moving to GDAP, organizations transition from a "global admin by default" approach to a **Least Privilege Access (LPA)** model, reducing the blast radius of a potential compromise at the service provider level and ensuring tighter compliance with data privacy standards.
## Key Recommendations
### Immediate Actions
1. **Audit Current DAP Relationships:** Identify all existing active Delegated Admin Privileges (DAP) currently in place between your organization and partners/tenants.
2. **Enable MFA:** Ensure Multi-Factor Authentication is enforced for all accounts that will be assigned granular roles.
3. **Identify Required Roles:** Catalog the specific tasks your team performs (e.g., password resets, license management, security monitoring) to map them to specific Azure AD roles rather than using "Global Admin."
### Short-term Improvements (1-3 months)
1. **Create GDAP Invitations:** Generate and send GDAP relationship requests to tenants, specifying the exact security groups and roles required.
2. **Set Time-Bound Access:** Configure the duration for GDAP relationships (maximum 730 days) to ensure access is not permanent and is subject to periodic review.
3. **Transition Security Groups:** Assign users to specific security groups that are then mapped to GDAP roles, rather than assigning roles to individual users.
### Long-term Strategy (3+ months)
1. **Decommission DAP:** Once GDAP relationships are verified and functional, actively remove legacy DAP permissions to eliminate "over-privileged" backdoors.
2. **Automate Lifecycle Management:** Implement a process to renew GDAP relationships before they expire (at the 2-year mark) to prevent service disruption.
3. **Continuous Role Auditing:** Quarterly review of assigned roles to ensure they still align with the "Least Privilege" principle as Microsoft releases new, even more granular roles.
## Implementation Guidance
### For Small Organizations
* **Simplify Roles:** Focus on a few "service-specific" roles (e.g., Helpdesk Administrator and Office 365 Stock Role) to keep management overhead low while still removing Global Admin rights.
### For Medium Organizations
* **Departmental Segregation:** Use separate security groups for different internal teams (e.g., a "Support" group with Helpdesk roles and a "Security" group with Security Reader roles).
### For Large Enterprises
* **Tiered Access Model:** Implement a tiered administration model where GDAP is integrated into an Identity Governance framework, ensuring high-privilege roles are only active during scheduled maintenance windows.
## Configuration Examples
* **Role Mapping:** Instead of **Global Administrator**, assign **Exchange Administrator** for mail issues, **User Administrator** for identity management, and **Security Reader** for monitoring.
* **Relationship Duration:** Set the `Duration` parameter to **730 days** for standard managed service agreements to balance security with operational continuity.
## Compliance Alignment
* **NIST SP 800-53:** Aligns with Access Control (AC) and Least Privilege requirements.
* **ISO/IEC 27001:** Supports the "Access Control" domain by ensuring user access is limited to authorized services.
* **CIS Controls:** Directly addresses Control 5 (Account Management) and Control 6 (Access Control Management).
## Common Pitfalls to Avoid
* **The "Global Admin" Habit:** Defaulting to Global Admin roles within GDAP, which defeats the purpose of the transition.
* **Ignoring Expiration:** Failing to track the 730-day expiration limit, which can lead to a sudden loss of access to tenant environments.
* **Overlapping Permissions:** Keeping legacy DAP active alongside GDAP, leaving a high-privilege attack vector open.
## Resources
* **Microsoft Partner Center Documentation:** hxxps[://]learn[.]microsoft[.]com/en-us/partner-center/gdap-introduction
* **Huntress Security Blog:** hxxps[://]www[.]huntress[.]com/blog
* **Microsoft GDAP Bulk Migration Tool:** Available via GitHub for transitioning multiple tenants simultaneously.