[BUG]: AzureFileCopy V6 fails to authenticate #21209
Description
New issue checklist
- I searched for existing GitHub issues
- I read pipeline troubleshooting guide
- I checked how to collect logs
Task name
AzureFileCopy
Task version
6.259.3
Issue Description
The task fails consistently on random build agents.
See Azure/azure-storage-azcopy#3155
Environment type (Please select at least one enviroment where you face this issue)
- Self-Hosted
- Microsoft Hosted
- VMSS Pool
- Container
Azure DevOps Server type
dev.azure.com (formerly visualstudio.com)
Azure DevOps Server Version (if applicable)
No response
Operation system
Windows 11
Relevant log output
& "AzCopy_Prev\AzCopy\AzCopy.exe" copy "C:\cagnt03\_work\2161\a\REDACTED" "[https://ostrdev001oesweu1.blob.core.windows.net/runbooks/"](https://ostrdev001oesweu1.blob.core.windows.net/REDACTED/%22) --log-level=INFO --recursive
INFO: Scanning...
INFO: Proxy detected: https://azcopyvnextrelease.blob.core.windows.net/ -> //REDACTED
Failed to perform Auto-login: PSContextCredentialGet-AzAccessToken: -REDACTED-;1mRun Connect-AzAccount to login.
.
Full task logs with system.debug enabled
```
2025-08-11T18:46:05.1655583Z ##[section]Starting: Copy runbook to StorageAccount
2025-08-11T18:46:05.1659991Z ==============================================================================
2025-08-11T18:46:05.1660074Z Task : Azure file copy
2025-08-11T18:46:05.1660112Z Description : Copy files to Azure Blob Storage or virtual machines
2025-08-11T18:46:05.1660177Z Version : 6.259.3
2025-08-11T18:46:05.1660216Z Author : Microsoft Corporation
2025-08-11T18:46:05.1660265Z Help : https://docs.microsoft.com/azure/devops/pipelines/tasks/deploy/azure-file-copy
2025-08-11T18:46:05.1660323Z ==============================================================================
2025-08-11T18:46:06.4611360Z Added TLS 1.2 in session.
2025-08-11T18:46:06.6272058Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Accounts\4.0.2\Az.Accounts.psd1 -Global
2025-08-11T18:46:07.5438162Z ##[command]Update-AzConfig -CheckForUpgrade False -AppliesTo Az -Scope Process
2025-08-11T18:46:07.6324642Z
2025-08-11T18:46:07.6968822Z ##[command]Get-AzConfig -AppliesTo Az
2025-08-11T18:46:07.7369600Z ##[command]Update-AzConfig -DisplayBreakingChangeWarning False -AppliesTo Az -Scope Process
2025-08-11T18:46:07.7612585Z ##[command]Enable-AzureRmAlias -Scope Process
2025-08-11T18:46:08.2158715Z ##[command]Clear-AzContext -Scope CurrentUser -Force -ErrorAction SilentlyContinue
2025-08-11T18:46:08.3615801Z ##[command]Clear-AzContext -Scope Process
2025-08-11T18:46:08.3954235Z ##[command]Clear-AzConfig -DefaultSubscriptionForLogin
2025-08-11T18:46:08.4471318Z ##[command]Connect-AzAccount
2025-08-11T18:46:08.4471752Z Name Value
2025-08-11T18:46:08.4471979Z ---- -----
2025-08-11T18:46:08.4472191Z Tenant REDACTED
2025-08-11T18:46:08.4472467Z Scope Process
2025-08-11T18:46:08.4472745Z Environment AzureCloud
2025-08-11T18:46:08.4473018Z Credential System.Management.Automation.PSCredential
2025-08-11T18:46:08.4473772Z WarningAction SilentlyContinue
2025-08-11T18:46:08.4474100Z ServicePrincipal True
2025-08-11T18:46:08.4474182Z
2025-08-11T18:46:08.4474239Z
2025-08-11T18:46:08.4474307Z
2025-08-11T18:46:09.5005068Z Key Value Applies To Scope Help Message
2025-08-11T18:46:09.5009895Z --- ----- ---------- ----- ------------
2025-08-11T18:46:09.5034120Z CheckForUpgrade False Az Process When enabled, Azure PowerShell will check for updates automati...
2025-08-11T18:46:09.5058398Z DisplayBreakingChangeWarning False Az Process Controls if warning messages for breaking changes are displaye...
2025-08-11T18:46:09.5058566Z
2025-08-11T18:46:09.5060536Z Environments : {[AzureChinaCloud, AzureChinaCloud], [AzureCloud, AzureCloud], [AzureUSGovernment, AzureUSGovernment]}
2025-08-11T18:46:09.5061073Z Context : Microsoft.Azure.Commands.Profile.Models.Core.PSAzureContext
2025-08-11T18:46:09.5061351Z
2025-08-11T18:46:09.5900466Z ##[command]Set-AzContext
2025-08-11T18:46:09.5900723Z Name Value
2025-08-11T18:46:09.5900893Z ---- -----
2025-08-11T18:46:09.5902743Z SubscriptionId REDACTED
2025-08-11T18:46:09.5902819Z
2025-08-11T18:46:09.5902857Z
2025-08-11T18:46:09.5902901Z
2025-08-11T18:46:10.1654506Z
2025-08-11T18:46:10.1660754Z Name : REDACTED -
2025-08-11T18:46:10.1661468Z REDACTED - ***
2025-08-11T18:46:10.1662151Z Subscription : REDACTED
2025-08-11T18:46:10.1662686Z Account : ***
2025-08-11T18:46:10.1662925Z Environment : AzureCloud
2025-08-11T18:46:10.1663999Z Tenant : REDACTED
2025-08-11T18:46:10.1664234Z TokenCache :
2025-08-11T18:46:10.1664409Z VersionProfile :
2025-08-11T18:46:10.1665239Z ExtendedProperties : {}
2025-08-11T18:46:10.1665506Z
2025-08-11T18:46:10.5102968Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Resources\7.8.1\Az.Resources.psd1 -Global
2025-08-11T18:46:12.4190659Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Storage\8.1.0\Az.Storage.psd1 -Global
2025-08-11T18:46:12.9188981Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Compute\9.1.0\Az.Compute.psd1 -Global
2025-08-11T18:46:13.7590737Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Network\7.14.0\Az.Network.psd1 -Global
2025-08-11T18:46:16.7653277Z mime: C:\cagnt02\_work\_tasks\AzureFileCopy_eb72cb01-a7e5-427b-a8a1-1b31ccac8a43\6.259.3\MimeMapping.json
2025-08-11T18:46:16.7693749Z Uploading files from source path: 'C:\cagnt02\_work\2021\a\runbook\Runbook.ps1' to storage account: 'REDACTED' in container: 'runbooks' with blob prefix: ''
2025-08-11T18:46:16.7799219Z ##[command] & "AzCopy_Prev\AzCopy\AzCopy.exe" copy "C:\cagnt02\_work\2021\a\runbook\Runbook.ps1" "https://ostrdev001oesweu1.blob.core.windows.net/runbooks/" --log-level=INFO --recursive
2025-08-11T18:46:16.8274988Z INFO: Scanning...
2025-08-11T18:46:16.8558993Z INFO: Proxy detected: https://azcopyvnextrelease.blob.core.windows.net -> //REDACTED:81
2025-08-11T18:46:25.2892694Z INFO: Login with Powershell context succeeded
2025-08-11T18:46:25.2893647Z INFO: Authenticating to destination using Azure AD
2025-08-11T18:46:25.2898553Z INFO: Any empty folders will not be processed, because source and/or destination doesn't have full folder support
2025-08-11T18:46:25.2988394Z
2025-08-11T18:46:25.2988801Z Job a1adc5a0-df36-7548-4224-ccfc4287c7f0 has started
2025-08-11T18:46:25.2989087Z Log file is located at: C:\Users\REDACTED\.azcopy\a1adc5a0-df36-7548-4224-ccfc4287c7f0.log
2025-08-11T18:46:25.2989229Z
2025-08-11T18:46:27.0793805Z INFO: Proxy detected: https://ostrdev001oesweu1.blob.core.windows.net -> //REDACTED:81
2025-08-11T18:46:27.2990546Z
2025-08-11T18:46:27.2991040Z 100.0 %, 1 Done, 0 Failed, 0 Pending, 0 Skipped, 1 Total, 2-sec Throughput (Mb/s): 0.0008
2025-08-11T18:46:27.2991248Z
2025-08-11T18:46:27.2991456Z
2025-08-11T18:46:27.2991708Z Job a1adc5a0-df36-7548-4224-ccfc4287c7f0 summary
2025-08-11T18:46:27.2991915Z Elapsed Time (Minutes): 0.0334
2025-08-11T18:46:27.2992100Z Number of File Transfers: 1
2025-08-11T18:46:27.2992283Z Number of Folder Property Transfers: 0
2025-08-11T18:46:27.2992467Z Number of Symlink Transfers: 0
2025-08-11T18:46:27.2992646Z Total Number of Transfers: 1
2025-08-11T18:46:27.2992827Z Number of File Transfers Completed: 1
2025-08-11T18:46:27.2993018Z Number of Folder Transfers Completed: 0
2025-08-11T18:46:27.2993203Z Number of File Transfers Failed: 0
2025-08-11T18:46:27.2993384Z Number of Folder Transfers Failed: 0
2025-08-11T18:46:27.2993565Z Number of File Transfers Skipped: 0
2025-08-11T18:46:27.2994864Z Number of Folder Transfers Skipped: 0
2025-08-11T18:46:27.2995059Z Total Number of Bytes Transferred: 188
2025-08-11T18:46:27.2995245Z Final Job Status: Completed
2025-08-11T18:46:27.2995322Z
2025-08-11T18:46:27.3090478Z Uploaded files successfully from source path: 'C:\cagnt02\_work\2021\a\runbook\Runbook.ps1' to storage account: 'ostrdev001oesweu1' in container: 'runbooks' with blob prefix: ''
2025-08-11T18:46:27.3639228Z ##[command]Disconnect-AzAccount -Scope Process -ErrorAction Stop
2025-08-11T18:46:27.3930299Z ##[command]Clear-AzContext -Scope Process -ErrorAction Stop
2025-08-11T18:46:27.4186077Z
2025-08-11T18:46:27.4186276Z
2025-08-11T18:46:27.4689983Z ##[section]Finishing: Copy runbook to StorageAccount
```
2025-08-08T10:09:27.0688944Z ##[section]Starting: Copy runbook to StorageAccount
2025-08-08T10:09:27.0695000Z ==============================================================================
2025-08-08T10:09:27.0695120Z Task : Azure file copy
2025-08-08T10:09:27.0695174Z Description : Copy files to Azure Blob Storage or virtual machines
2025-08-08T10:09:27.0695280Z Version : 6.259.3
2025-08-08T10:09:27.0695329Z Author : Microsoft Corporation
2025-08-08T10:09:27.0695385Z Help : https://docs.microsoft.com/azure/devops/pipelines/tasks/deploy/azure-file-copy
2025-08-08T10:09:27.0695498Z ==============================================================================
2025-08-08T10:09:28.5577727Z Added TLS 1.2 in session.
2025-08-08T10:09:28.7303369Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Accounts\4.0.2\Az.Accounts.psd1 -Global
2025-08-08T10:09:29.7704300Z ##[command]Update-AzConfig -CheckForUpgrade False -AppliesTo Az -Scope Process
2025-08-08T10:09:29.8817332Z
2025-08-08T10:09:29.9452272Z ##[command]Get-AzConfig -AppliesTo Az
2025-08-08T10:09:29.9876473Z ##[command]Update-AzConfig -DisplayBreakingChangeWarning False -AppliesTo Az -Scope Process
2025-08-08T10:09:30.0090869Z ##[command]Enable-AzureRmAlias -Scope Process
2025-08-08T10:09:30.7008085Z ##[command]Clear-AzContext -Scope CurrentUser -Force -ErrorAction SilentlyContinue
2025-08-08T10:09:30.7721746Z ##[command]Clear-AzContext -Scope Process
2025-08-08T10:09:30.7939954Z ##[command]Clear-AzConfig -DefaultSubscriptionForLogin
2025-08-08T10:09:30.8368002Z ##[command]Connect-AzAccount
2025-08-08T10:09:30.8368394Z Name Value
2025-08-08T10:09:30.8368976Z ---- -----
2025-08-08T10:09:30.8369621Z Tenant REDACTED
2025-08-08T10:09:30.8369982Z Scope Process
2025-08-08T10:09:30.8370194Z Environment AzureCloud
2025-08-08T10:09:30.8370434Z Credential System.Management.Automation.PSCredential
2025-08-08T10:09:30.8370676Z WarningAction SilentlyContinue
2025-08-08T10:09:30.8370892Z ServicePrincipal True
2025-08-08T10:09:30.8370979Z
2025-08-08T10:09:30.8371039Z
2025-08-08T10:09:30.8371106Z
2025-08-08T10:09:31.9319645Z Key Value Applies To Scope Help Message
2025-08-08T10:09:31.9321932Z --- ----- ---------- ----- ------------
2025-08-08T10:09:31.9339128Z CheckForUpgrade False Az Process When enabled, Azure PowerShell will check for updates automati...
2025-08-08T10:09:31.9355291Z DisplayBreakingChangeWarning False Az Process Controls if warning messages for breaking changes are displaye...
2025-08-08T10:09:31.9355709Z
2025-08-08T10:09:31.9356264Z Environments : {[AzureCloud, AzureCloud], [AzureChinaCloud, AzureChinaCloud], [AzureUSGovernment, AzureUSGovernment]}
2025-08-08T10:09:31.9356611Z Context : Microsoft.Azure.Commands.Profile.Models.Core.PSAzureContext
2025-08-08T10:09:31.9356807Z
2025-08-08T10:09:32.0117282Z ##[command]Set-AzContext
2025-08-08T10:09:32.0117656Z Name Value
2025-08-08T10:09:32.0118157Z ---- -----
2025-08-08T10:09:32.0120300Z SubscriptionId REDACTED
2025-08-08T10:09:32.0120417Z
2025-08-08T10:09:32.0120487Z
2025-08-08T10:09:32.0120545Z
2025-08-08T10:09:32.6944414Z
2025-08-08T10:09:32.6948935Z Name : REDACTED -
2025-08-08T10:09:32.6949513Z REDACTED - ***
2025-08-08T10:09:32.6949775Z Subscription : REDACTED
2025-08-08T10:09:32.6950094Z Account : ***
2025-08-08T10:09:32.6950485Z Environment : AzureCloud
2025-08-08T10:09:32.6951198Z Tenant : REDACTED
2025-08-08T10:09:32.6951430Z TokenCache :
2025-08-08T10:09:32.6951900Z VersionProfile :
2025-08-08T10:09:32.6952507Z ExtendedProperties : {}
2025-08-08T10:09:32.6952620Z
2025-08-08T10:09:33.1032652Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Resources\7.8.1\Az.Resources.psd1 -Global
2025-08-08T10:09:35.5657166Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Storage\8.1.0\Az.Storage.psd1 -Global
2025-08-08T10:09:36.1930662Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Compute\9.1.0\Az.Compute.psd1 -Global
2025-08-08T10:09:37.5179525Z ##[command]Import-Module -Name C:\Users\REDACTED\Documents\PowerShell\Modules\Az.Network\7.14.0\Az.Network.psd1 -Global
2025-08-08T10:09:40.5169303Z mime: C:\cagnt03\_work\_tasks\AzureFileCopy_eb72cb01-a7e5-427b-a8a1-1b31ccac8a43\6.259.3\MimeMapping.json
2025-08-08T10:09:40.5210860Z Uploading files from source path: 'C:\cagnt03\_work\2161\a\runbook\Runbook.ps1' to storage account: 'ostrdev001oesweu1' in container: 'runbooks' with blob prefix: ''
2025-08-08T10:09:40.5303823Z ##[command] & "AzCopy_Prev\AzCopy\AzCopy.exe" copy "C:\cagnt03\_work\2161\a\runbook\Runbook.ps1" "https://ostrdev001oesweu1.blob.core.windows.net/runbooks/" --log-level=INFO --recursive
2025-08-08T10:09:40.5996527Z INFO: Scanning...
2025-08-08T10:09:40.6304789Z INFO: Proxy detected: https://azcopyvnextrelease.blob.core.windows.net -> //REDACTED:81
2025-08-08T10:09:41.8299760Z
2025-08-08T10:09:41.8300636Z Failed to perform Auto-login: PSContextCredential�[31;1mGet-AzAccessToken: -REDACTED-;1mRun Connect-AzAccount to login.�[0m
2025-08-08T10:09:41.8300822Z .
2025-08-08T10:09:41.9420572Z ##[command]Disconnect-AzAccount -Scope Process -ErrorAction Stop
2025-08-08T10:09:41.9702762Z ##[command]Clear-AzContext -Scope Process -ErrorAction Stop
2025-08-08T10:09:42.0473103Z ##[error]Upload to container: 'runbooks' in storage account: 'ostrdev001oesweu1' with blob prefix: '' failed with error: 'AzCopy.exe exited with non-zero exit code while uploading files to blob storage.' For more info please refer to https://aka.ms/azurefilecopyreadme
2025-08-08T10:09:42.0980128Z ##[section]Finishing: Copy runbook to StorageAccount
Repro steps
Unknown what causes this