az backup container unregister - 'NoneType' object has no attribute 'name'

[sc-draymond]

Describe the bug

Running the "az backup container unregister" command in a PowerShell script results in an error with a non-existent path.

Related command

az backup container unregister

Errors

The command failed with an unexpected error. Here is the traceback:
'NoneType' object has no attribute 'name'
Traceback (most recent call last):
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\knack/cli.py", line 233, in invoke
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 666, in execute
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 734, in _run_jobs_serially
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 726, in _run_job
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/_exception_handler.py", line 11, in backup_exception_handler
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 703, in _run_job
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 336, in call
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/command_operation.py", line 120, in handler
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/custom_base.py", line 374, in unregister_container
AttributeError: 'NoneType' object has no attribute 'name'

Issue script & Debug output

az backup container unregister --backup-management-type AzureIaasVM --container-name "MyFriendlyName" --resource-group "MyResourceGroup" --subscription "MySubscriptionID" --vault-name "MyVaultName" --yes

Expected behavior

The container is unregistered

Environment Summary

Windows-11-10.0.26200-SP0
Python 3.13.9
Installer: MSI

azure-cli 2.81.0

Extensions:
bastion 1.4.2
serviceconnector-passwordless 3.3.6
ssh 2.0.6

Dependencies:
msal 1.34.0b1
azure-mgmt-resource 23.3.0

Additional context

No response

[yonzhan]

Thank you for opening this issue, we will look into it.

[microsoft-github-policy-service]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @Daya-Patil.

[zubairabid]

@sc-draymond hi, could you please share the debug log? You should be able to get that if you run the command with ... --debug as an option at the end. According to the current implementation, this should only arise if we are unable to find a container to unregister in the first place, I'll verify if that is indeed the case.

[sc-draymond]

Here is the debug log.
`cli.knack.cli: Command arguments: ['backup', 'container', 'unregister', '--backup-management-type', 'AzureIaasVM', '--container-name', 'vm-dmr-us-09', '--resource-group', 'rg-dmr-us-09', '--subscription', 'eeee44df-5c88-4466-a347-ab5cc5e61eb6', '--vault-name', 'rsv-dmr-us-09', '--yes', '--debug']
cli.knack.cli: init debug log:
Enable color in terminal.
cli.knack.cli: Event: Cli.PreExecute []
cli.knack.cli: Event: CommandParser.OnGlobalArgumentsCreate [<function CLILogging.on_global_arguments at 0x000001F50FDCCF40>, <function OutputProducer.on_global_arguments at 0x000001F50FE6DA80>, <function CLIQuery.on_global_arguments at 0x000001F50FE97BA0>]
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableCreate []
cli.azure.cli.core: Modules found from index for 'backup': ['azure.cli.command_modules.backup']
cli.azure.cli.core: Loading command modules:
cli.azure.cli.core: Name Load Time Groups Commands
cli.azure.cli.core: backup 0.012 17 65
cli.azure.cli.core: Total (1) 0.012 17 65
cli.azure.cli.core: These extensions are not installed and will be skipped: ['azext_ai_examples', 'azext_next']
cli.azure.cli.core: Loading extensions:
cli.azure.cli.core: Name Load Time Groups Commands Directory
cli.azure.cli.core: Total (0) 0.000 0 0
cli.azure.cli.core: Loaded 17 groups, 65 commands.
cli.azure.cli.core: Found a match in the command table.
cli.azure.cli.core: Raw command : backup container unregister
cli.azure.cli.core: Command table: backup container unregister
cli.knack.cli: Event: CommandInvoker.OnPreCommandTableTruncate [<function AzCliLogging.init_command_file_logging at 0x000001F5102A0B80>]
cli.azure.cli.core.azlogging: metadata file logging enabled - writing logs to 'C:\Users\draymond.azure\commands\2026-01-07.13-31-03.backup_container_unregister.39144.log'.
az_command_data_logger: command args: backup container unregister --backup-management-type {} --container-name {} --resource-group {} --subscription {} --vault-name {} --yes --debug
cli.knack.cli: Event: CommandInvoker.OnPreArgumentLoad [<function register_global_subscription_argument..add_subscription_parameter at 0x000001F5102EA020>]
cli.knack.cli: Event: CommandInvoker.OnPostArgumentLoad []
cli.knack.cli: Event: CommandInvoker.OnPostCommandTableCreate [<function register_ids_argument..add_ids_arguments at 0x000001F51030C360>, <function register_cache_arguments..add_cache_arguments at 0x000001F51030C540>, <function register_upcoming_breaking_change_info..update_breaking_change_info at 0x000001F51030C5E0>]
cli.knack.cli: Event: CommandInvoker.OnCommandTableLoaded []
cli.knack.cli: Event: CommandInvoker.OnPreParseArgs []
cli.knack.cli: Event: CommandInvoker.OnPostParseArgs [<function OutputProducer.handle_output_argument at 0x000001F50FE6DB20>, <function CLIQuery.handle_query_parameter at 0x000001F50FE97C40>, <function register_ids_argument..parse_ids_arguments at 0x000001F51030C400>]
cli.azure.cli.core.commands.client_factory: Getting management service client client_type=RecoveryServicesBackupClient
cli.azure.cli.core.auth.persistence: build_persistence: location='C:\Users\draymond\.azure\msal_token_cache.bin', encrypt=True
cli.azure.cli.core.auth.binary_cache: load: C:\Users\draymond.azure\msal_http_cache.bin
urllib3.util.retry: Converted retries value: 1 -> Retry(total=1, connect=None, read=None, redirect=None, status=None)
msal.authority: Initializing with Entra authority: https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f
msal.authority: openid_config("https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/v2.0/.well-known/openid-configuration") = {'token_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/token', 'token_endpoint_auth_methods_supported': ['client_secret_post', 'private_key_jwt', 'client_secret_basic', 'self_signed_tls_client_auth'], 'jwks_uri': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/discovery/v2.0/keys', 'response_modes_supported': ['query', 'fragment', 'form_post'], 'subject_types_supported': ['pairwise'], 'id_token_signing_alg_values_supported': ['RS256'], 'response_types_supported': ['code', 'id_token', 'code id_token', 'id_token token'], 'scopes_supported': ['openid', 'profile', 'email', 'offline_access'], 'issuer': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/v2.0', 'request_uri_parameter_supported': False, 'userinfo_endpoint': 'https://graph.microsoft.com/oidc/userinfo', 'authorization_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/authorize', 'device_authorization_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/devicecode', 'http_logout_supported': True, 'frontchannel_logout_supported': True, 'end_session_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/logout', 'claims_supported': ['sub', 'iss', 'cloud_instance_name', 'cloud_instance_host_name', 'cloud_graph_host_name', 'msgraph_host', 'aud', 'exp', 'iat', 'auth_time', 'acr', 'nonce', 'preferred_username', 'name', 'tid', 'ver', 'at_hash', 'c_hash', 'email'], 'kerberos_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/kerberos', 'mtls_endpoint_aliases': {'token_endpoint': 'https://mtlsauth.microsoft.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/token'}, 'tls_client_certificate_bound_access_tokens': True, 'tenant_region_scope': 'EU', 'cloud_instance_name': 'microsoftonline.com', 'cloud_graph_host_name': 'graph.windows.net', 'msgraph_host': 'graph.microsoft.com', 'rbac_url': 'https://pas.windows.net'}
msal.application: Broker enabled? None
cli.azure.cli.core.commands.client_factory: Getting management service client client_type=RecoveryServicesBackupClient
urllib3.util.retry: Converted retries value: 1 -> Retry(total=1, connect=None, read=None, redirect=None, status=None)
msal.authority: Initializing with Entra authority: https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f
msal.authority: openid_config("https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/v2.0/.well-known/openid-configuration") = {'token_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/token', 'token_endpoint_auth_methods_supported': ['client_secret_post', 'private_key_jwt', 'client_secret_basic', 'self_signed_tls_client_auth'], 'jwks_uri': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/discovery/v2.0/keys', 'response_modes_supported': ['query', 'fragment', 'form_post'], 'subject_types_supported': ['pairwise'], 'id_token_signing_alg_values_supported': ['RS256'], 'response_types_supported': ['code', 'id_token', 'code id_token', 'id_token token'], 'scopes_supported': ['openid', 'profile', 'email', 'offline_access'], 'issuer': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/v2.0', 'request_uri_parameter_supported': False, 'userinfo_endpoint': 'https://graph.microsoft.com/oidc/userinfo', 'authorization_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/authorize', 'device_authorization_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/devicecode', 'http_logout_supported': True, 'frontchannel_logout_supported': True, 'end_session_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/logout', 'claims_supported': ['sub', 'iss', 'cloud_instance_name', 'cloud_instance_host_name', 'cloud_graph_host_name', 'msgraph_host', 'aud', 'exp', 'iat', 'auth_time', 'acr', 'nonce', 'preferred_username', 'name', 'tid', 'ver', 'at_hash', 'c_hash', 'email'], 'kerberos_endpoint': 'https://login.microsoftonline.com/49c37f1a-f524-491d-8972-a2ca439ac80f/kerberos', 'mtls_endpoint_aliases': {'token_endpoint': 'https://mtlsauth.microsoft.com/49c37f1a-f524-491d-8972-a2ca439ac80f/oauth2/v2.0/token'}, 'tls_client_certificate_bound_access_tokens': True, 'tenant_region_scope': 'EU', 'cloud_instance_name': 'microsoftonline.com', 'cloud_graph_host_name': 'graph.windows.net', 'msgraph_host': 'graph.microsoft.com', 'rbac_url': 'https://pas.windows.net'}
msal.application: Broker enabled? None
cli.azure.cli.core.auth.credential_adaptor: CredentialAdaptor.get_token_info: scopes=('https://management.core.windows.net//.default',), options={}
cli.azure.cli.core.auth.msal_credentials: UserCredential.acquire_token: scopes=['https://management.core.windows.net//.default'], claims_challenge=None, kwargs={}
msal.application: Cache hit an AT
msal.telemetry: Generate or reuse correlation_id: 5483f14f-f484-48ac-ae3d-67d8caa01a9a
cli.azure.cli.core.sdk.policies: Request URL: 'https://management.azure.com/subscriptions/eeee44df-5c88-4466-a347-ab5cc5e61eb6/resourceGroups/rg-dmr-us-09/providers/Microsoft.RecoveryServices/vaults/rsv-dmr-us-09/backupProtectionContainers?api-version=2025-02-01&%24filter=backupManagementType+eq+%27AzureIaasVM%27+and+friendlyName+eq+%27vm-dmr-us-09%27+and+status+eq+%27Registered%27'
cli.azure.cli.core.sdk.policies: Request method: 'GET'
cli.azure.cli.core.sdk.policies: Request headers:
cli.azure.cli.core.sdk.policies: 'Accept': 'application/json'
cli.azure.cli.core.sdk.policies: 'x-ms-client-request-id': '2b106c05-ec10-11f0-b22a-68545a97e98c'
cli.azure.cli.core.sdk.policies: 'CommandName': 'backup container unregister'
cli.azure.cli.core.sdk.policies: 'ParameterSetName': '--backup-management-type --container-name --resource-group --subscription --vault-name --yes --debug'
cli.azure.cli.core.sdk.policies: 'User-Agent': 'AZURECLI/2.81.0 (MSI) azsdk-python-core/1.35.0 Python/3.13.9 (Windows-11-10.0.26200-SP0)'
cli.azure.cli.core.sdk.policies: 'Authorization': '*****'
cli.azure.cli.core.sdk.policies: Request body:
cli.azure.cli.core.sdk.policies: This request has no body
urllib3.connectionpool: Starting new HTTPS connection (1): management.azure.com:443
urllib3.connectionpool: https://management.azure.com:443 "GET /subscriptions/eeee44df-5c88-4466-a347-ab5cc5e61eb6/resourceGroups/rg-dmr-us-09/providers/Microsoft.RecoveryServices/vaults/rsv-dmr-us-09/backupProtectionContainers?api-version=2025-02-01&%24filter=backupManagementType+eq+%27AzureIaasVM%27+and+friendlyName+eq+%27vm-dmr-us-09%27+and+status+eq+%27Registered%27 HTTP/1.1" 200 12
cli.azure.cli.core.sdk.policies: Response status: 200
cli.azure.cli.core.sdk.policies: Response headers:
cli.azure.cli.core.sdk.policies: 'Cache-Control': 'no-cache'
cli.azure.cli.core.sdk.policies: 'Pragma': 'no-cache'
cli.azure.cli.core.sdk.policies: 'Content-Length': '12'
cli.azure.cli.core.sdk.policies: 'Content-Type': 'application/json; charset=utf-8'
cli.azure.cli.core.sdk.policies: 'Expires': '-1'
cli.azure.cli.core.sdk.policies: 'X-Content-Type-Options': 'nosniff'
cli.azure.cli.core.sdk.policies: 'x-ms-request-id': 'a9b698d9-0da5-4078-8a42-0a64be30169b'
cli.azure.cli.core.sdk.policies: 'x-ms-client-request-id': '2b106c05-ec10-11f0-b22a-68545a97e98c'
cli.azure.cli.core.sdk.policies: 'x-ms-operation-identifier': 'tenantId=49c37f1a-f524-491d-8972-a2ca439ac80f,objectId=7a4cc362-7188-420c-aab9-b9a2ff623f4d/centralus/54b676f0-2eba-41eb-a683-ba07822ab520'
cli.azure.cli.core.sdk.policies: 'x-ms-ratelimit-remaining-subscription-resource-requests': '249'
cli.azure.cli.core.sdk.policies: 'x-ms-correlation-request-id': 'a9b698d9-0da5-4078-8a42-0a64be30169b'
cli.azure.cli.core.sdk.policies: 'x-ms-routing-request-id': 'CENTRALUS:20260107T213105Z:a9b698d9-0da5-4078-8a42-0a64be30169b'
cli.azure.cli.core.sdk.policies: 'Strict-Transport-Security': 'max-age=31536000; includeSubDomains'
cli.azure.cli.core.sdk.policies: 'X-Cache': 'CONFIG_NOCACHE'
cli.azure.cli.core.sdk.policies: 'X-MSEdge-Ref': 'Ref A: 6DE4861D03994489B09119C1489B5BCC Ref B: BY1AA1072315060 Ref C: 2026-01-07T21:31:05Z'
cli.azure.cli.core.sdk.policies: 'Date': 'Wed, 07 Jan 2026 21:31:05 GMT'
cli.azure.cli.core.sdk.policies: Response content:
cli.azure.cli.core.sdk.policies: {"value":[]}
cli.azure.cli.core.azclierror: Traceback (most recent call last):
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\knack/cli.py", line 233, in invoke
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 666, in execute
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 734, in _run_jobs_serially
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 726, in _run_job
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/_exception_handler.py", line 11, in backup_exception_handler
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 703, in _run_job
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 336, in call
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/command_operation.py", line 120, in handler
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/custom_base.py", line 374, in unregister_container
AttributeError: 'NoneType' object has no attribute 'name'

cli.azure.cli.core.azclierror: The command failed with an unexpected error. Here is the traceback:
az_command_data_logger: The command failed with an unexpected error. Here is the traceback:
cli.azure.cli.core.azclierror: 'NoneType' object has no attribute 'name'
Traceback (most recent call last):
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\knack/cli.py", line 233, in invoke
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 666, in execute
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 734, in _run_jobs_serially
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 726, in _run_job
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/_exception_handler.py", line 11, in backup_exception_handler
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 703, in _run_job
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 336, in call
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/command_operation.py", line 120, in handler
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/custom_base.py", line 374, in unregister_container
AttributeError: 'NoneType' object has no attribute 'name'
az_command_data_logger: 'NoneType' object has no attribute 'name'
Traceback (most recent call last):
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\knack/cli.py", line 233, in invoke
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 666, in execute
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 734, in _run_jobs_serially
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 726, in _run_job
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/_exception_handler.py", line 11, in backup_exception_handler
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 703, in run_job
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 336, in call
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/command_operation.py", line 120, in handler
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/custom_base.py", line 374, in unregister_container
AttributeError: 'NoneType' object has no attribute 'name'
To check existing issues, please visit: https://github.com/Azure/azure-cli/issues
cli.knack.cli: Event: Cli.PostExecute [<function AzCliLogging.deinit_cmd_metadata_logging at 0x000001F5102A0E00>]
az_command_data_logger: exit code: 1
cli.main: Command ran in 2.394 seconds (init: 0.331, invoke: 2.062)
telemetry.main: Begin splitting cli events and extra events, total events: 1
telemetry.client: Accumulated 0 events. Flush the clients.
telemetry.main: Finish splitting cli events and extra events, cli events: 1
telemetry.save: Save telemetry record of length 8130 in cache file under C:\Users\draymond.azure\telemetry\20260107133105644
telemetry.main: Begin creating telemetry upload process.
telemetry.process: Creating upload process: "C:\Program Files\Microsoft SDKs\Azure\CLI2\python.exe C:\Program Files\Microsoft SDKs\Azure\CLI2\Lib\site-packages\azure\cli\telemetry_init.pyc C:\Users\draymond.azure C:\Users\draymond.azure\telemetry\20260107133105644"
telemetry.process: Return from creating process 26328
telemetry.main: Finish creating telemetry upload process.

`

[zubairabid]

Thanks for the update, @sc-draymond . It seems to be a bug where we have no handled container unregister for soft-deleted containers. I've raised a PR to handle this scenario.