How do I update the properties of a user that is synced from my on-premises AD in Azure AD.

@Sanghoon Lee
I just wanted to check in and see if you had any other questions or if you were able to resolve this issue?

If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.

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But, when I updated the user's properties (such as displayName, department, and so on), some users succeeded in updating, but some users failed to update.

In Azure AD, the audit logs of the update successful user and the failed user are as follows.

///// update success user's partial log

"targetResources": [
{
"id": "xxxx",
"displayName": null,
"type": "User",
"userPrincipalName": "xxxx@xxxxxxxxxxxxx ",
"groupType": null,
"modifiedProperties": [
{
"displayName": "Included Updated Properties",
"oldValue": null,
"newValue": "\"\""
},
{
"displayName": "TargetId.UserType",
"oldValue": null,
"newValue": "\"Member\""
}
]
}
]

////// update fail user's partial log
"targetResources": [
{
"id": "xxxx",
"displayName": null,
"type": "User",
"userPrincipalName": "xxxx@X ",
"groupType": null,
"modifiedProperties": [
{
"displayName": "MethodExecutionResult.",
"oldValue": null,
"newValue": "\"Microsoft.Online.Workflows.PropertyUpdateNotAllowedException\""
},
{
"displayName": "TargetId.UserType",
"oldValue": null,
"newValue": "\"Member\""
}
]
}
],

Could you tell why the results are so different?