ERROR_DS_SRC_SID_EXISTS_IN_FOREST - 8539 (0x215B)

Technical Meaning

This error code indicates that an attempt was made to move or copy a security identifier (SID) from one forest to another, but the target forest already contains a SID with the same value. This is a specific technical mechanism related to Active Directory operations.

Error Details

The ERROR_DS_SRC_SID_EXISTS_IN_FOREST error code is returned when an operation involving SIDs fails because the source object's SID already exists in the destination forest. This can occur during forest trust or domain migration scenarios where SIDs are expected to be unique across forests.

Usage Context

This error typically arises in scenarios such as:

• Forest trust operations
• Domain migrations
• Active Directory replication issues
• Security configuration changes

Developer Interpretation

When encountering this error, developers should understand that it is a validation failure related to SIDs. The operation cannot proceed because the target forest already contains an object with the same SID as the source object. This can affect operations such as trust establishment or domain consolidation.

Related Errors

• ERROR_DS_SRC_SID_EXISTS_IN_FOREST (8539)
• ERROR_DS_DST_SID_EXISTS (8540)
• ERROR_DS_NO_RID available for allocation (8526)

FAQ

Q: What does the error mean?

A: The source object's SID already exists in the destination forest, preventing the operation from completing.

Q: How can I resolve this issue?

A: Ensure that SIDs are unique across forests before performing operations such as trust establishment or domain migration. Consider renaming objects or adjusting their SIDs to avoid conflicts.

Summary

The ERROR_DS_SRC_SID_EXISTS_IN_FOREST error code is a specific technical mechanism related to Active Directory operations, indicating a validation failure due to duplicate SIDs in the target forest. Developers should ensure that SIDs are unique across forests to prevent this issue.