When bulk offboarding by serial number getting following error -
"Message": "An error has occurred - Operation ID (for customer support): 00000000-0000-0000-0000-000000000000 - Activity ID: 4b08890c-5c6d-4138-b2fe-b1869cd6a673 - Url: https://proxy.msub03.manage.microsoft.com/DeviceEnrollmentFE/StatelessDeviceEnrollmentFEService/deviceManagement/windowsAutopilotDeviceIdentities('e1249b2e-bcff-48c5-916d-0e63840448cb%2059666b88-410b-463c-bcd7-37ca5cbb4d73%2038495bb4-5448-4843-a964-f91461259129%20e316d881-2b2e-4094-bd05-8484a34db32e%200fa8ff48-48cd-4454-a2b8-d9a3a44a5068%20527bd090-7d6d-41a3-9681-7a55db78e194%20e5840129-e6de-46c3-bdf0-e35e8a639989%20800c007b-629e-4934-9bf6-2e94f0bad9ba%20fec83f0a-3c9c-4f1b-8f9b-8d0a95a3e942%20a9762a7f-3019-4e0e-ad5d-7a2b5fd04315%20dbdb56a8-761a-456b-9de9-ceb18ceb2fb7%20132e1e6d-64b2-48e9-9d37-3dae042b6f63%202c606978-237c-4b21-8561-0e22e1e8e5d4%2081cf1e60-0d93-45ed-a2e9-cc6695cd5d88%20b37ecf1e-48cf-4b10-9b86-9b0ccc2a1856%20ecb00d01-f88e-45b6-a33f-4667c6d39a8d%2099e24bf3-0c2b-42f7-b408-a758dccd2f3e%20665b3b79-66e2-4087-a600-a1e744780bb0%205a81743d-69fa-42f2-af87-9e1d2e47da01%200cbe629d-74da-4c8e-bc43-ecf82b6afc9b%207337ede8-bb2d-4f81-bcb9-a7474ec2c6db%20c033cee5-15fc-487b-977d-c3d494cbeca8%20e83b0048-6aab-44f3-86a5-870d365420fb%209928cc9c-c4bd-4716-aa58-ee6a82c7f670%201f57b163-889c-4a57-80b1-4f1852bafaee%20b3837a5d-eef0-470e-8ddc-71e01c2eba1c%208f28768b-eee0-4bfa-94dd-63281cb6e933')?api-version=5025-11-25 - CustomApiErrorPhrase: KeyValidationFailed",
"CustomApiErrorPhrase": "KeyValidationFailed",
"RetryAfter": null,
"ErrorSourceService": "",
"HttpHeaders": "{}"
} (request-id: 618c3fe5-c8fb-4321-80d0-c31396b4cdeb; client-request-id: 4b08890c-5c6d-4138-b2fe-b1869cd6a673)
2026-07-13 09:02:22 | ERROR | Luca.Bugeja@mfsa.mt | Error removing device from Autopilot (fallback): Graph error 400 [KeyValidationFailed]: {
"_version": 3,
"Message": "An error has occurred - Operation ID (for customer support): 00000000-0000-0000-0000-000000000000 - Activity ID: ac31fb18-ea3b-40c0-8ccf-b2f867268a7a - Url: https://proxy.msub03.manage.microsoft.com/DeviceEnrollmentFE/StatelessDeviceEnrollmentFEService/deviceManagement/windowsAutopilotDeviceIdentities('e1249b2e-bcff-48c5-916d-0e63840448cb%2059666b88-410b-463c-bcd7-37ca5cbb4d73%2038495bb4-5448-4843-a964-f91461259129%20e316d881-2b2e-4094-bd05-8484a34db32e%200fa8ff48-48cd-4454-a2b8-d9a3a44a5068%20527bd090-7d6d-41a3-9681-7a55db78e194%20e5840129-e6de-46c3-bdf0-e35e8a639989%20800c007b-629e-4934-9bf6-2e94f0bad9ba%20fec83f0a-3c9c-4f1b-8f9b-8d0a95a3e942%20a9762a7f-3019-4e0e-ad5d-7a2b5fd04315%20dbdb56a8-761a-456b-9de9-ceb18ceb2fb7%20132e1e6d-64b2-48e9-9d37-3dae042b6f63%202c606978-237c-4b21-8561-0e22e1e8e5d4%2081cf1e60-0d93-45ed-a2e9-cc6695cd5d88%20b37ecf1e-48cf-4b10-9b86-9b0ccc2a1856%20ecb00d01-f88e-45b6-a33f-4667c6d39a8d%2099e24bf3-0c2b-42f7-b408-a758dccd2f3e%20665b3b79-66e2-4087-a600-a1e744780bb0%205a81743d-69fa-42f2-af87-9e1d2e47da01%200cbe629d-74da-4c8e-bc43-ecf82b6afc9b%207337ede8-bb2d-4f81-bcb9-a7474ec2c6db%20c033cee5-15fc-487b-977d-c3d494cbeca8%20e83b0048-6aab-44f3-86a5-870d365420fb%209928cc9c-c4bd-4716-aa58-ee6a82c7f670%201f57b163-889c-4a57-80b1-4f1852bafaee%20b3837a5d-eef0-470e-8ddc-71e01c2eba1c%208f28768b-eee0-4bfa-94dd-63281cb6e933')?api-version=5025-11-25 - CustomApiErrorPhrase: KeyValidationFailed",
"CustomApiErrorPhrase": "KeyValidationFailed",
"RetryAfter": null,
"ErrorSourceService": "",
"HttpHeaders": "{}"
} (request-id: e2d14a32-085f-4c3a-9102-7368902e0a09; client-request-id: ac31fb18-ea3b-40c0-8ccf-b2f867268a7a)
2026-07-13 09:02:23 | ERROR | Luca.Bugeja@mfsa.mt | Error removing device from Autopilot (fallback): Graph error 400 [KeyValidationFailed]: {
"_version": 3,
"Message": "An error has occurred - Operation ID (for customer support): 00000000-0000-0000-0000-000000000000 - Activity ID: 2444157c-d0b2-4791-826b-1df2f8e183e9 - Url: https://proxy.msub03.manage.microsoft.com/DeviceEnrollmentFE/StatelessDeviceEnrollmentFEService/deviceManagement/windowsAutopilotDeviceIdentities('e1249b2e-bcff-48c5-916d-0e63840448cb%2059666b88-410b-463c-bcd7-37ca5cbb4d73%2038495bb4-5448-4843-a964-f91461259129%20e316d881-2b2e-4094-bd05-8484a34db32e%200fa8ff48-48cd-4454-a2b8-d9a3a44a5068%20527bd090-7d6d-41a3-9681-7a55db78e194%20e5840129-e6de-46c3-bdf0-e35e8a639989%20800c007b-629e-4934-9bf6-2e94f0bad9ba%20fec83f0a-3c9c-4f1b-8f9b-8d0a95a3e942%20a9762a7f-3019-4e0e-ad5d-7a2b5fd04315%20dbdb56a8-761a-456b-9de9-ceb18ceb2fb7%20132e1e6d-64b2-48e9-9d37-3dae042b6f63%202c606978-237c-4b21-8561-0e22e1e8e5d4%2081cf1e60-0d93-45ed-a2e9-cc6695cd5d88%20b37ecf1e-48cf-4b10-9b86-9b0ccc2a1856%20ecb00d01-f88e-45b6-a33f-4667c6d39a8d%2099e24bf3-0c2b-42f7-b408-a758dccd2f3e%20665b3b79-66e2-4087-a600-a1e744780bb0%205a81743d-69fa-42f2-af87-9e1d2e47da01%200cbe629d-74da-4c8e-bc43-ecf82b6afc9b%207337ede8-bb2d-4f81-bcb9-a7474ec2c6db%20c033cee5-15fc-487b-977d-c3d494cbeca8%20e83b0048-6aab-44f3-86a5-870d365420fb%209928cc9c-c4bd-4716-aa58-ee6a82c7f670%201f57b163-889c-4a57-80b1-4f1852bafaee%20b3837a5d-eef0-470e-8ddc-71e01c2eba1c%208f28768b-eee0-4bfa-94dd-63281cb6e933')?api-version=5025-11-25 - CustomApiErrorPhrase: KeyValidationFailed",
"CustomApiErrorPhrase": "KeyValidationFailed",
"RetryAfter": null,
"ErrorSourceService": "",
"HttpHeaders": "{}"
} (request-id: 2e364012-ace2-40e9-992c-4a0a29c6c477; client-request-id: 2444157c-d0b2-4791-826b-1df2f8e183e9)
I think only 1 device is being deleted at a time. Deleting only 1 device at a time works.
When bulk offboarding by serial number getting following error -
"Message": "An error has occurred - Operation ID (for customer support): 00000000-0000-0000-0000-000000000000 - Activity ID: 4b08890c-5c6d-4138-b2fe-b1869cd6a673 - Url: https://proxy.msub03.manage.microsoft.com/DeviceEnrollmentFE/StatelessDeviceEnrollmentFEService/deviceManagement/windowsAutopilotDeviceIdentities('e1249b2e-bcff-48c5-916d-0e63840448cb%2059666b88-410b-463c-bcd7-37ca5cbb4d73%2038495bb4-5448-4843-a964-f91461259129%20e316d881-2b2e-4094-bd05-8484a34db32e%200fa8ff48-48cd-4454-a2b8-d9a3a44a5068%20527bd090-7d6d-41a3-9681-7a55db78e194%20e5840129-e6de-46c3-bdf0-e35e8a639989%20800c007b-629e-4934-9bf6-2e94f0bad9ba%20fec83f0a-3c9c-4f1b-8f9b-8d0a95a3e942%20a9762a7f-3019-4e0e-ad5d-7a2b5fd04315%20dbdb56a8-761a-456b-9de9-ceb18ceb2fb7%20132e1e6d-64b2-48e9-9d37-3dae042b6f63%202c606978-237c-4b21-8561-0e22e1e8e5d4%2081cf1e60-0d93-45ed-a2e9-cc6695cd5d88%20b37ecf1e-48cf-4b10-9b86-9b0ccc2a1856%20ecb00d01-f88e-45b6-a33f-4667c6d39a8d%2099e24bf3-0c2b-42f7-b408-a758dccd2f3e%20665b3b79-66e2-4087-a600-a1e744780bb0%205a81743d-69fa-42f2-af87-9e1d2e47da01%200cbe629d-74da-4c8e-bc43-ecf82b6afc9b%207337ede8-bb2d-4f81-bcb9-a7474ec2c6db%20c033cee5-15fc-487b-977d-c3d494cbeca8%20e83b0048-6aab-44f3-86a5-870d365420fb%209928cc9c-c4bd-4716-aa58-ee6a82c7f670%201f57b163-889c-4a57-80b1-4f1852bafaee%20b3837a5d-eef0-470e-8ddc-71e01c2eba1c%208f28768b-eee0-4bfa-94dd-63281cb6e933')?api-version=5025-11-25 - CustomApiErrorPhrase: KeyValidationFailed",
"CustomApiErrorPhrase": "KeyValidationFailed",
"RetryAfter": null,
"ErrorSourceService": "",
"HttpHeaders": "{}"
} (request-id: 618c3fe5-c8fb-4321-80d0-c31396b4cdeb; client-request-id: 4b08890c-5c6d-4138-b2fe-b1869cd6a673)
2026-07-13 09:02:22 | ERROR | Luca.Bugeja@mfsa.mt | Error removing device from Autopilot (fallback): Graph error 400 [KeyValidationFailed]: {
"_version": 3,
"Message": "An error has occurred - Operation ID (for customer support): 00000000-0000-0000-0000-000000000000 - Activity ID: ac31fb18-ea3b-40c0-8ccf-b2f867268a7a - Url: https://proxy.msub03.manage.microsoft.com/DeviceEnrollmentFE/StatelessDeviceEnrollmentFEService/deviceManagement/windowsAutopilotDeviceIdentities('e1249b2e-bcff-48c5-916d-0e63840448cb%2059666b88-410b-463c-bcd7-37ca5cbb4d73%2038495bb4-5448-4843-a964-f91461259129%20e316d881-2b2e-4094-bd05-8484a34db32e%200fa8ff48-48cd-4454-a2b8-d9a3a44a5068%20527bd090-7d6d-41a3-9681-7a55db78e194%20e5840129-e6de-46c3-bdf0-e35e8a639989%20800c007b-629e-4934-9bf6-2e94f0bad9ba%20fec83f0a-3c9c-4f1b-8f9b-8d0a95a3e942%20a9762a7f-3019-4e0e-ad5d-7a2b5fd04315%20dbdb56a8-761a-456b-9de9-ceb18ceb2fb7%20132e1e6d-64b2-48e9-9d37-3dae042b6f63%202c606978-237c-4b21-8561-0e22e1e8e5d4%2081cf1e60-0d93-45ed-a2e9-cc6695cd5d88%20b37ecf1e-48cf-4b10-9b86-9b0ccc2a1856%20ecb00d01-f88e-45b6-a33f-4667c6d39a8d%2099e24bf3-0c2b-42f7-b408-a758dccd2f3e%20665b3b79-66e2-4087-a600-a1e744780bb0%205a81743d-69fa-42f2-af87-9e1d2e47da01%200cbe629d-74da-4c8e-bc43-ecf82b6afc9b%207337ede8-bb2d-4f81-bcb9-a7474ec2c6db%20c033cee5-15fc-487b-977d-c3d494cbeca8%20e83b0048-6aab-44f3-86a5-870d365420fb%209928cc9c-c4bd-4716-aa58-ee6a82c7f670%201f57b163-889c-4a57-80b1-4f1852bafaee%20b3837a5d-eef0-470e-8ddc-71e01c2eba1c%208f28768b-eee0-4bfa-94dd-63281cb6e933')?api-version=5025-11-25 - CustomApiErrorPhrase: KeyValidationFailed",
"CustomApiErrorPhrase": "KeyValidationFailed",
"RetryAfter": null,
"ErrorSourceService": "",
"HttpHeaders": "{}"
} (request-id: e2d14a32-085f-4c3a-9102-7368902e0a09; client-request-id: ac31fb18-ea3b-40c0-8ccf-b2f867268a7a)
2026-07-13 09:02:23 | ERROR | Luca.Bugeja@mfsa.mt | Error removing device from Autopilot (fallback): Graph error 400 [KeyValidationFailed]: {
"_version": 3,
"Message": "An error has occurred - Operation ID (for customer support): 00000000-0000-0000-0000-000000000000 - Activity ID: 2444157c-d0b2-4791-826b-1df2f8e183e9 - Url: https://proxy.msub03.manage.microsoft.com/DeviceEnrollmentFE/StatelessDeviceEnrollmentFEService/deviceManagement/windowsAutopilotDeviceIdentities('e1249b2e-bcff-48c5-916d-0e63840448cb%2059666b88-410b-463c-bcd7-37ca5cbb4d73%2038495bb4-5448-4843-a964-f91461259129%20e316d881-2b2e-4094-bd05-8484a34db32e%200fa8ff48-48cd-4454-a2b8-d9a3a44a5068%20527bd090-7d6d-41a3-9681-7a55db78e194%20e5840129-e6de-46c3-bdf0-e35e8a639989%20800c007b-629e-4934-9bf6-2e94f0bad9ba%20fec83f0a-3c9c-4f1b-8f9b-8d0a95a3e942%20a9762a7f-3019-4e0e-ad5d-7a2b5fd04315%20dbdb56a8-761a-456b-9de9-ceb18ceb2fb7%20132e1e6d-64b2-48e9-9d37-3dae042b6f63%202c606978-237c-4b21-8561-0e22e1e8e5d4%2081cf1e60-0d93-45ed-a2e9-cc6695cd5d88%20b37ecf1e-48cf-4b10-9b86-9b0ccc2a1856%20ecb00d01-f88e-45b6-a33f-4667c6d39a8d%2099e24bf3-0c2b-42f7-b408-a758dccd2f3e%20665b3b79-66e2-4087-a600-a1e744780bb0%205a81743d-69fa-42f2-af87-9e1d2e47da01%200cbe629d-74da-4c8e-bc43-ecf82b6afc9b%207337ede8-bb2d-4f81-bcb9-a7474ec2c6db%20c033cee5-15fc-487b-977d-c3d494cbeca8%20e83b0048-6aab-44f3-86a5-870d365420fb%209928cc9c-c4bd-4716-aa58-ee6a82c7f670%201f57b163-889c-4a57-80b1-4f1852bafaee%20b3837a5d-eef0-470e-8ddc-71e01c2eba1c%208f28768b-eee0-4bfa-94dd-63281cb6e933')?api-version=5025-11-25 - CustomApiErrorPhrase: KeyValidationFailed",
"CustomApiErrorPhrase": "KeyValidationFailed",
"RetryAfter": null,
"ErrorSourceService": "",
"HttpHeaders": "{}"
} (request-id: 2e364012-ace2-40e9-992c-4a0a29c6c477; client-request-id: 2444157c-d0b2-4791-826b-1df2f8e183e9)
I think only 1 device is being deleted at a time. Deleting only 1 device at a time works.