diff --git a/src/bootstrap/socket.cc b/src/bootstrap/socket.cc
index 9e5913403..6377bc6de 100644
--- a/src/bootstrap/socket.cc
+++ b/src/bootstrap/socket.cc
@@ -1,8 +1,6 @@
-/*************************************************************************
- * Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.
- *
- * See LICENSE.txt for license information
- ************************************************************************/
+// Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.
+// Modifications Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
 
 #include "socket.h"
 
diff --git a/src/debug.cc b/src/debug.cc
index aa97b09db..dea9ee713 100644
--- a/src/debug.cc
+++ b/src/debug.cc
@@ -1,8 +1,6 @@
-/*************************************************************************
- * Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.
- *
- * See LICENSE.txt for license information
- ************************************************************************/
+// Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.
+// Modifications Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
 
 #include "debug.h"
 
diff --git a/src/endpoint.cc b/src/endpoint.cc
index 35817793f..015d51a60 100644
--- a/src/endpoint.cc
+++ b/src/endpoint.cc
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 #include "endpoint.hpp"
 
 #include <algorithm>
diff --git a/src/include/debug.h b/src/include/debug.h
index c3cc9f36d..1abbad340 100644
--- a/src/include/debug.h
+++ b/src/include/debug.h
@@ -1,8 +1,6 @@
-/*************************************************************************
- * Copyright (c) 2015-2022, NVIDIA CORPORATION. All rights reserved.
- *
- * See LICENSE.txt for license information
- ************************************************************************/
+// Copyright (c) 2015-2022, NVIDIA CORPORATION. All rights reserved.
+// Modifications Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
 
 #ifndef MSCCLPP_DEBUG_H_
 #define MSCCLPP_DEBUG_H_
diff --git a/src/include/ibverbs_wrapper.hpp b/src/include/ibverbs_wrapper.hpp
index e862cbea3..fe67268a8 100644
--- a/src/include/ibverbs_wrapper.hpp
+++ b/src/include/ibverbs_wrapper.hpp
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT license.
+
 #ifndef MSCCLPP_IBVERBS_WRAPPER_HPP_
 #define MSCCLPP_IBVERBS_WRAPPER_HPP_
 
diff --git a/src/include/utils_internal.hpp b/src/include/utils_internal.hpp
index 52edd1889..3cd06bf52 100644
--- a/src/include/utils_internal.hpp
+++ b/src/include/utils_internal.hpp
@@ -1,8 +1,6 @@
-/*************************************************************************
- * Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.
- *
- * See LICENSE.txt for license information
- ************************************************************************/
+// Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.
+// Modifications Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
 
 #ifndef MSCCLPP_UTILS_INTERNAL_HPP_
 #define MSCCLPP_UTILS_INTERNAL_HPP_
diff --git a/test/executor_test.cc b/test/executor_test.cc
index f85c38454..2f6d9cf5d 100644
--- a/test/executor_test.cc
+++ b/test/executor_test.cc
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 #include <mpi.h>
 #include <unistd.h>
 
diff --git a/test/unit/utils_internal_tests.cc b/test/unit/utils_internal_tests.cc
index 6ae04561b..5479a681a 100644
--- a/test/unit/utils_internal_tests.cc
+++ b/test/unit/utils_internal_tests.cc
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
 #include <gtest/gtest.h>
 
 #include <thread>