diff --git a/src/libraries/System.Transactions.Local/ref/System.Transactions.Local.cs b/src/libraries/System.Transactions.Local/ref/System.Transactions.Local.cs
index 2f08b176bc27b..8f92c7c0f412b 100644
--- a/src/libraries/System.Transactions.Local/ref/System.Transactions.Local.cs
+++ b/src/libraries/System.Transactions.Local/ref/System.Transactions.Local.cs
@@ -191,6 +191,7 @@ public static partial class TransactionManager
         [System.Diagnostics.CodeAnalysis.DisallowNullAttribute]
         public static System.Transactions.HostCurrentTransactionCallback? HostCurrentCallback { get { throw null; } set { } }
         public static System.TimeSpan MaximumTimeout { get { throw null; } set { } }
+        public static bool ImplicitDistributedTransactions { get; set; }
         public static event System.Transactions.TransactionStartedEventHandler? DistributedTransactionStarted { add { } remove { } }
         public static void RecoveryComplete(System.Guid resourceManagerIdentifier) { }
         public static System.Transactions.Enlistment Reenlist(System.Guid resourceManagerIdentifier, byte[] recoveryInformation, System.Transactions.IEnlistmentNotification enlistmentNotification) { throw null; }
diff --git a/src/libraries/System.Transactions.Local/src/Resources/Strings.resx b/src/libraries/System.Transactions.Local/src/Resources/Strings.resx
index 7e75fee595f9a..484e8520aaa0f 100644
--- a/src/libraries/System.Transactions.Local/src/Resources/Strings.resx
+++ b/src/libraries/System.Transactions.Local/src/Resources/Strings.resx
@@ -423,4 +423,7 @@
   <data name="DistributedNotSupportedOn32Bits" xml:space="preserve">
     <value>Distributed transactions are currently unsupported in 32-bit processes.</value>
   </data>
-</root>
+  <data name="ImplicitDistributedTransactionsDisabled" xml:space="preserve">
+    <value>Implicit distributed transactions have not been enabled. If you're intentionally starting a distributed transaction, set TransactionManager.ImplicitDistributedTransactions to true.</value>
+  </data>
+</root>
\ No newline at end of file
diff --git a/src/libraries/System.Transactions.Local/src/System/Transactions/DtcProxyShim/DtcProxyShimFactory.cs b/src/libraries/System.Transactions.Local/src/System/Transactions/DtcProxyShim/DtcProxyShimFactory.cs
index 0a65a8a72a18b..cf5cb38fc4121 100644
--- a/src/libraries/System.Transactions.Local/src/System/Transactions/DtcProxyShim/DtcProxyShimFactory.cs
+++ b/src/libraries/System.Transactions.Local/src/System/Transactions/DtcProxyShim/DtcProxyShimFactory.cs
@@ -59,10 +59,14 @@ public void ConnectToProxy(
         out byte[] whereabouts,
         out ResourceManagerShim resourceManagerShim)
     {
-        switch (RuntimeInformation.ProcessArchitecture)
+        if (RuntimeInformation.ProcessArchitecture == Architecture.X86)
         {
-            case Architecture.X86:
-                throw new PlatformNotSupportedException(SR.DistributedNotSupportedOn32Bits);
+            throw new PlatformNotSupportedException(SR.DistributedNotSupportedOn32Bits);
+        }
+
+        if (!TransactionManager.ImplicitDistributedTransactions)
+        {
+            throw new NotSupportedException(SR.ImplicitDistributedTransactionsDisabled);
         }
 
         ConnectToProxyCore(nodeName, resourceManagerIdentifier, managedIdentifier, out nodeNameMatches, out whereabouts, out resourceManagerShim);
diff --git a/src/libraries/System.Transactions.Local/src/System/Transactions/TransactionManager.cs b/src/libraries/System.Transactions.Local/src/System/Transactions/TransactionManager.cs
index 7ce21c51bad23..02ebc9e29b4f5 100644
--- a/src/libraries/System.Transactions.Local/src/System/Transactions/TransactionManager.cs
+++ b/src/libraries/System.Transactions.Local/src/System/Transactions/TransactionManager.cs
@@ -391,6 +391,8 @@ public static TimeSpan MaximumTimeout
             }
         }
 
+        public static bool ImplicitDistributedTransactions { get; set; }
+
         // This routine writes the "header" for the recovery information, based on the
         // type of the calling object and its provided parameter collection.  This information
         // we be read back by the static Reenlist method to create the necessary transaction
diff --git a/src/libraries/System.Transactions.Local/tests/OleTxTests.cs b/src/libraries/System.Transactions.Local/tests/OleTxTests.cs
index 71893a29f98bd..3e0894f4dedfb 100644
--- a/src/libraries/System.Transactions.Local/tests/OleTxTests.cs
+++ b/src/libraries/System.Transactions.Local/tests/OleTxTests.cs
@@ -469,6 +469,8 @@ private static void Test(Action action)
             return;
         }
 
+        TransactionManager.ImplicitDistributedTransactions = true;
+
         // In CI, we sometimes get XACT_E_TMNOTAVAILABLE; when it happens, it's typically on the very first
         // attempt to connect to MSDTC (flaky/slow on-demand startup of MSDTC), though not only.
         // This catches that error and retries.
@@ -524,7 +526,20 @@ public class OleTxFixture
         // this is likely due to on-demand slow startup of MSDTC. Perform pre-test connecting with retry
         // to ensure that MSDTC is properly up when the first test runs.
         public OleTxFixture()
-            => Test(() =>
+        {
+            Test(() =>
+            {
+                TransactionManager.ImplicitDistributedTransactions = false;
+
+                using var tx = new CommittableTransaction();
+
+                Assert.Throws<NotSupportedException>(()
+                    => tx.EnlistDurable(Guid.NewGuid(), new TestEnlistment(Phase1Vote.Done, EnlistmentOutcome.Committed), EnlistmentOptions.None));
+            });
+
+            TransactionManager.ImplicitDistributedTransactions = true;
+
+            Test(() =>
             {
                 using var tx = new CommittableTransaction();
 
@@ -536,5 +551,6 @@ public OleTxFixture()
 
                 tx.Commit();
             });
+        }
     }
 }