Windows Server 2019 – Storage Replica test failover fails with access denied – Fix & Prevention

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Planned DR validation cannot proceed because temporary writable snapshot mount is denied.

Environment & Reproduction

Occurs when test failover account lacks local admin or volume ACL rights.

Test-SRTopology -SourceComputerName  -SourceVolumeName D: -DestinationComputerName  -DestinationVolumeName D: -DurationInMinutes 5

Root Cause Analysis

Insufficient privilege on destination host prevents creation or mount of test target volume.

Quick Triage

Validate caller token and local group membership on destination node.

whoami /groups
Get-LocalGroupMember -Group Administrators

Step-by-Step Diagnosis

Collect Storage Replica admin events and inspect security audit failures.

Get-WinEvent -LogName Microsoft-Windows-StorageReplica/Admin -MaxEvents 200
Get-WinEvent -LogName Security -MaxEvents 200 | ? {$_.Id -eq 4625}

Solution – Primary Fix

Run test failover with delegated account that has required destination permissions.

Test-SRFailover -SourceComputerName  -SourceRGName  -DestinationComputerName  -DestinationRGName  -DurationInMinutes 30

Solution – Alternative Approaches

Use Just Enough Administration endpoint preconfigured with SR cmdlet role capability.

Verification & Acceptance Criteria

Test volume mounts read-write on destination and validation scripts complete successfully.

Rollback Plan

Stop test failover and remove temporary access grants if policy exceptions were applied.

Prevention & Hardening

Define RBAC model for Storage Replica operations and pre-validate DR runbook identities.

Related Errors & Cross-Refs

May coincide with UAC token filtering and constrained endpoint execution policy blocks.

Related tutorial: View the step-by-step tutorial for Windows Server 2019.

View all Windows Server 2019 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Microsoft Learn: Storage Replica test failover operations and delegated administration.