Introduction
One of the most common areas of confusion in Dynamics 365 plugin development is understanding the difference between UserId and InitiatingUserId.
At first glance, both properties appear to represent the user responsible for an operation. However, they serve very different purposes and understanding the distinction is critical when implementing security, auditing, impersonation, and business logic within plugins.
Many developers encounter unexpected behavior when a plugin executes under a different user context than expected. This often leads to incorrect permission checks, inaccurate audit information, or troubleshooting challenges.
In this article, we’ll explore the differences between UserId and InitiatingUserId, understand when each should be used, examine impersonation scenarios, and review common mistakes developers make.
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Both UserId and InitiatingUserId are available through the Plugin Execution Context. If you’re unfamiliar with how plugin stages execute, read our guide on Dynamics 365 Plugin Execution Pipeline.
What is UserId in Dynamics 365?
The UserId property represents the user account under which the plugin is currently executing.
It determines:
- Security privileges
- Access permissions
- Record visibility
- Service operations performed within the plugin
UserId can be retrieved using:
Guid userId = context.UserId;
When creating an organization service:
IOrganizationService service =
serviceFactory.CreateOrganizationService(
context.UserId
);
The operations performed through this service will execute using the privileges of the UserId.
Example
Suppose John updates an Account record.
The plugin is registered to run as:
Calling User
In this case:
UserId = John
The plugin executes using John’s security permissions.
What is InitiatingUserId in Dynamics 365?
The InitiatingUserId property represents the original user who started the operation.
Unlike UserId, InitiatingUserId never changes during the execution chain.
It can be accessed using:
Guid initiatingUserId =
context.InitiatingUserId;
This property is especially useful for:
- Auditing
- Tracking user actions
- Logging
- Business rules based on the actual user who initiated the request
Example
John updates an Account record.
The operation triggers a plugin.
The plugin triggers another plugin.
Throughout the entire execution chain:
InitiatingUserId = John
Even if execution switches users later, the original initiating user remains the same.
UserId vs InitiatingUserId: Key Difference
The easiest way to remember the difference is:
UserId
=
Who the plugin is running as
InitiatingUserId
=
Who originally started the operation
Simple Scenario
John updates an Account record.
Plugin executes as Calling User.
UserId = John
InitiatingUserId = John
In this scenario, both values are identical.
However, things become more interesting when impersonation is involved.
Scenario 1: No Impersonation
Let’s consider a standard plugin execution.
Flow
John Updates Account
↓
Plugin Executes
Result:
UserId = John
InitiatingUserId = John
Since the plugin executes under the calling user context, both properties contain the same value.
Scenario 2: Plugin Executes as a Different User
Dynamics 365 allows plugins to execute under a specific user account.
For example:
Plugin Registered As:
System Administrator
Now consider the following scenario:
John Updates Account
↓
Plugin Executes
Result:
UserId = System Administrator
InitiatingUserId = John
This is where many developers become confused.
Although John initiated the operation, the plugin executes using the privileges of the System Administrator account.
Why Is This Useful?
Running a plugin under a privileged account can help when:
- End users lack permissions
- Integration scenarios require elevated access
- Business processes need controlled execution
However, if auditing is required, developers should use InitiatingUserId rather than UserId.
Scenario 3: Impersonation Using CreateOrganizationService
Another common scenario involves impersonation inside plugin code.
Example:
IOrganizationService adminService =
serviceFactory.CreateOrganizationService(
adminUserId
);
Now operations performed through this service execute using the specified user account.
Consider the following flow:
John Updates Account
↓
Plugin Executes
↓
Admin Service Created
↓
Additional Operations Performed
Result:
InitiatingUserId = John
UserId = User Context Of Current Execution
This distinction becomes important when implementing audit trails and security-sensitive business logic.
Real-World Use Cases for UserId and InitiatingUserId
Understanding the difference between UserId and InitiatingUserId becomes extremely important when implementing business logic, security controls, and audit requirements.
Let’s look at some common real-world scenarios.
Scenario 1: Audit Logging
Suppose an organization wants to track who originally updated a high-value customer record.
A plugin executes using a System Administrator account, but the actual update was performed by John.
Using:
context.UserId
would return:
System Administrator
Using:
context.InitiatingUserId
would return:
John
For auditing purposes, InitiatingUserId is usually the correct choice because it identifies the user who actually initiated the operation.
Scenario 2: Business Rules Based on User Role
Consider a requirement:
Apply additional validation only when Sales Representatives update an Opportunity.
In this scenario, you need to determine who initiated the operation.
Using InitiatingUserId allows the plugin to retrieve the original user’s security roles and apply the appropriate business rules.
Scenario 3: Elevated Privilege Operations
Sometimes end users lack permissions to perform certain operations.
A plugin may be configured to run as a System Administrator account to perform actions on behalf of the user.
Example:
User Updates Record
↓
Plugin Executes As System Administrator
↓
Related Records Updated
In this scenario:
UserId = System Administrator
InitiatingUserId = Original User
This approach is frequently used in integration and automation scenarios.
Scenario 4: Troubleshooting Plugin Executions
When debugging plugins, developers often need answers to questions such as:
- Who started this operation?
- Under which account is the plugin executing?
- Why does this plugin have access to records that the user cannot see?
UserId and InitiatingUserId provide those answers.
Understanding both values can significantly reduce troubleshooting time.
Security Implications
One of the biggest mistakes developers make is assuming UserId always represents the person who performed the action.
This assumption can lead to incorrect security implementations.
Example
A plugin validates whether a user belongs to a specific business unit.
If the plugin executes under a privileged service account:
UserId = Service Account
The validation may produce incorrect results.
Instead, the plugin should evaluate:
InitiatingUserId
to identify the actual user responsible for the request.
How UserId Affects Organization Service Operations
When creating an organization service using:
IOrganizationService service =
serviceFactory.CreateOrganizationService(
context.UserId
);
All operations execute using the security privileges associated with UserId.
This affects:
- Create operations
- Update operations
- Delete operations
- Retrieve operations
- Associate operations
As a result, UserId directly impacts security enforcement within the plugin.
Common Mistakes Developers Make
Mistake 1: Using UserId for Audit Purposes
Many developers write:
Guid userId = context.UserId;
and assume this identifies the person who initiated the operation.
In impersonation scenarios, this assumption is incorrect.
For audit trails and user tracking, InitiatingUserId is often the better choice.
Mistake 2: Ignoring Plugin Registration Context
A plugin configured to execute as:
Calling User
behaves differently from a plugin configured to execute as:
Specific User
Developers should always verify the plugin step configuration before implementing security-sensitive logic.
Mistake 3: Using InitiatingUserId for Service Operations
Some developers create organization services using:
serviceFactory.CreateOrganizationService(
context.InitiatingUserId
);
without understanding the security implications.
Always ensure the selected user context aligns with business requirements.
Mistake 4: Assuming Values Never Differ
Many developers only test scenarios where:
UserId = InitiatingUserId
As a result, they never discover issues until the solution is deployed into production environments using service accounts or impersonation.
UserId vs InitiatingUserId Comparison
| Feature | UserId | InitiatingUserId |
|---|---|---|
| Represents Current Execution User | Yes | No |
| Represents Original User | No | Yes |
| Used For Security Checks | Yes | Sometimes |
| Used For Auditing | Rarely | Yes |
| Affected By Impersonation | Yes | No |
| Changes During Execution Chain | Possible | No |
This table provides a quick reference when deciding which property should be used.
UserId, InitiatingUserId and Plugin Depth
When troubleshooting recursive plugin executions, understanding the initiating user becomes even more important.
Consider the following scenario:
John Updates Account
↓
Plugin Executes
↓
Plugin Updates Contact
↓
Another Plugin Executes
As the execution chain grows, identifying the original user becomes more difficult.
InitiatingUserId remains constant throughout the operation and helps developers understand who originally triggered the process.
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Plugin Depth Exceeded Error in Dynamics 365
Learn how recursive plugin execution can lead to depth-related errors and how to prevent them.
UserId and Shared Variables
Complex plugin solutions often combine Shared Variables with UserId and InitiatingUserId.
For example:
context.SharedVariables["InitiatingUser"] =
context.InitiatingUserId;
This allows information about the original user to be shared across multiple plugin steps.
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Shared Variables in Dynamics 365 Plugins
Learn how to pass information between plugin steps efficiently using Shared Variables.
Best Practices
✔ Use UserId when performing security-sensitive operations.
✔ Use InitiatingUserId when implementing audit trails.
✔ Understand the plugin registration context before writing business logic.
✔ Test impersonation scenarios during development.
✔ Verify assumptions using Plugin Trace Logs.
✔ Document which user context your plugin relies on.
✔ Avoid hardcoding user-specific logic whenever possible.
Frequently Asked Questions
What is UserId in Dynamics 365 Plugins?
UserId represents the user account under which the plugin is currently executing.
What is InitiatingUserId in Dynamics 365 Plugins?
InitiatingUserId represents the original user who initiated the operation.
Can UserId and InitiatingUserId be different?
Yes. They commonly differ when impersonation or service accounts are involved.
Which property should I use for auditing?
In most cases, InitiatingUserId should be used because it identifies the user who originally triggered the operation.
Which property affects security permissions?
UserId affects the security context used by organization service operations.
Does InitiatingUserId change during plugin execution?
No. InitiatingUserId remains constant throughout the execution chain.
Can UserId change?
Yes. UserId may vary depending on plugin registration settings and impersonation scenarios.
Conclusion
Although UserId and InitiatingUserId appear similar, they serve fundamentally different purposes within Dynamics 365 plugin development.
UserId identifies the account under which the plugin currently executes and determines security permissions. InitiatingUserId identifies the user who originally started the operation and is essential for auditing and user tracking.
Understanding the distinction between these properties is critical when implementing business logic, troubleshooting execution issues, designing secure solutions, and supporting impersonation scenarios.
By using the appropriate property for the right purpose, developers can build more secure, maintainable, and reliable Dynamics 365 solutions.