diff --git a/sdk/core/azure-core/CHANGELOG.md b/sdk/core/azure-core/CHANGELOG.md
index f77fe1020e82..759a911cace5 100644
--- a/sdk/core/azure-core/CHANGELOG.md
+++ b/sdk/core/azure-core/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Release History
 
+## 1.42.0 (Unreleased)
+
+### Features Added
+
+- Added `azure-deprecating` to the default allowed headers list in `HttpLoggingPolicy`, so deprecation notification headers are logged without redaction.
+
 ## 1.41.0 (2026-05-07)
 
 ### Features Added
diff --git a/sdk/core/azure-core/azure/core/pipeline/policies/_universal.py b/sdk/core/azure-core/azure/core/pipeline/policies/_universal.py
index 9be81820904f..1e221ceb413c 100644
--- a/sdk/core/azure-core/azure/core/pipeline/policies/_universal.py
+++ b/sdk/core/azure-core/azure/core/pipeline/policies/_universal.py
@@ -438,6 +438,7 @@ class HttpLoggingPolicy(
             "WWW-Authenticate",  # OAuth Challenge header.
             "x-vss-e2eid",  # Needed by Azure DevOps pipelines.
             "x-msedge-ref",  # Needed by Azure DevOps pipelines.
+            "azure-deprecating",  # Deprecation notification header.
         ]
     )
     REDACTED_PLACEHOLDER: str = "REDACTED"
diff --git a/sdk/core/azure-core/tests/test_pipeline.py b/sdk/core/azure-core/tests/test_pipeline.py
index af6ca1a1a0ea..8262a70827f9 100644
--- a/sdk/core/azure-core/tests/test_pipeline.py
+++ b/sdk/core/azure-core/tests/test_pipeline.py
@@ -73,6 +73,7 @@ def test_default_http_logging_policy(http_request):
     assert "WWW-Authenticate" in http_logging_policy.allowed_header_names
     assert "x-vss-e2eid" in http_logging_policy.allowed_header_names
     assert "x-msedge-ref" in http_logging_policy.allowed_header_names
+    assert "azure-deprecating" in http_logging_policy.allowed_header_names
     # Testing I can replace the set entirely
     HttpLoggingPolicy.DEFAULT_HEADERS_ALLOWLIST = set(HttpLoggingPolicy.DEFAULT_HEADERS_ALLOWLIST)
     HttpLoggingPolicy.DEFAULT_HEADERS_WHITELIST = set(HttpLoggingPolicy.DEFAULT_HEADERS_ALLOWLIST)