diff --git a/sdk/servicebus/service-bus/CHANGELOG.md b/sdk/servicebus/service-bus/CHANGELOG.md
index 45df73270c5e..04c08bcb2a44 100644
--- a/sdk/servicebus/service-bus/CHANGELOG.md
+++ b/sdk/servicebus/service-bus/CHANGELOG.md
@@ -8,6 +8,8 @@
 
 ### Bugs Fixed
 
+- Correct typing of `propertiesToModify` options to `abandonMessages()`, `deferMessages()`, and "deadLetterMessages()" [PR #20577](https://github.com/Azure/azure-sdk-for-js/pull/20577)
+
 ### Other Changes
 
 - Migrate to depend on newer version of Core libraries core-client and core-rest-pipeline which bring better maintainability and performance. [PR #19587](https://github.com/Azure/azure-sdk-for-js/pull/19587)
diff --git a/sdk/servicebus/service-bus/review/service-bus.api.md b/sdk/servicebus/service-bus/review/service-bus.api.md
index 1e4390ffe7ce..9dfb3cb92275 100644
--- a/sdk/servicebus/service-bus/review/service-bus.api.md
+++ b/sdk/servicebus/service-bus/review/service-bus.api.md
@@ -468,15 +468,15 @@ export interface ServiceBusReceivedMessage extends ServiceBusMessage {
 // @public
 export interface ServiceBusReceiver {
     abandonMessage(message: ServiceBusReceivedMessage, propertiesToModify?: {
-        [key: string]: any;
+        [key: string]: number | boolean | string | Date | null;
     }): Promise<void>;
     close(): Promise<void>;
     completeMessage(message: ServiceBusReceivedMessage): Promise<void>;
     deadLetterMessage(message: ServiceBusReceivedMessage, options?: DeadLetterOptions & {
-        [key: string]: any;
+        [key: string]: number | boolean | string | Date | null;
     }): Promise<void>;
     deferMessage(message: ServiceBusReceivedMessage, propertiesToModify?: {
-        [key: string]: any;
+        [key: string]: number | boolean | string | Date | null;
     }): Promise<void>;
     entityPath: string;
     getMessageIterator(options?: GetMessageIteratorOptions): AsyncIterableIterator<ServiceBusReceivedMessage>;
diff --git a/sdk/servicebus/service-bus/src/receivers/receiver.ts b/sdk/servicebus/service-bus/src/receivers/receiver.ts
index 7198658b4862..7ffdd559e519 100644
--- a/sdk/servicebus/service-bus/src/receivers/receiver.ts
+++ b/sdk/servicebus/service-bus/src/receivers/receiver.ts
@@ -193,7 +193,7 @@ export interface ServiceBusReceiver {
    */
   abandonMessage(
     message: ServiceBusReceivedMessage,
-    propertiesToModify?: { [key: string]: any }
+    propertiesToModify?: { [key: string]: number | boolean | string | Date | null }
   ): Promise<void>;
   /**
    * Defers the processing of the message. Save the `sequenceNumber` of the message, in order to
@@ -219,7 +219,7 @@ export interface ServiceBusReceiver {
    */
   deferMessage(
     message: ServiceBusReceivedMessage,
-    propertiesToModify?: { [key: string]: any }
+    propertiesToModify?: { [key: string]: number | boolean | string | Date | null }
   ): Promise<void>;
   /**
    * Moves the message to the deadletter sub-queue. To receive a deadletted message, create a new
@@ -246,7 +246,7 @@ export interface ServiceBusReceiver {
    */
   deadLetterMessage(
     message: ServiceBusReceivedMessage,
-    options?: DeadLetterOptions & { [key: string]: any }
+    options?: DeadLetterOptions & { [key: string]: number | boolean | string | Date | null }
   ): Promise<void>;
   /**
    * Renews the lock on the message for the duration as specified during the Queue/Subscription
@@ -543,7 +543,7 @@ export class ServiceBusReceiverImpl implements ServiceBusReceiver {
 
   async abandonMessage(
     message: ServiceBusReceivedMessage,
-    propertiesToModify?: { [key: string]: any }
+    propertiesToModify?: { [key: string]: number | boolean | string | Date | null }
   ): Promise<void> {
     this._throwIfReceiverOrConnectionClosed();
     throwErrorIfInvalidOperationOnMessage(message, this.receiveMode, this._context.connectionId);
@@ -559,7 +559,7 @@ export class ServiceBusReceiverImpl implements ServiceBusReceiver {
 
   async deferMessage(
     message: ServiceBusReceivedMessage,
-    propertiesToModify?: { [key: string]: any }
+    propertiesToModify?: { [key: string]: number | boolean | string | Date | null }
   ): Promise<void> {
     this._throwIfReceiverOrConnectionClosed();
     throwErrorIfInvalidOperationOnMessage(message, this.receiveMode, this._context.connectionId);
@@ -575,7 +575,7 @@ export class ServiceBusReceiverImpl implements ServiceBusReceiver {
 
   async deadLetterMessage(
     message: ServiceBusReceivedMessage,
-    options?: DeadLetterOptions & { [key: string]: any }
+    options?: DeadLetterOptions & { [key: string]: number | boolean | string | Date | null }
   ): Promise<void> {
     this._throwIfReceiverOrConnectionClosed();
     throwErrorIfInvalidOperationOnMessage(message, this.receiveMode, this._context.connectionId);
diff --git a/sdk/servicebus/service-bus/src/receivers/receiverCommon.ts b/sdk/servicebus/service-bus/src/receivers/receiverCommon.ts
index c98c75ec9bb4..69fe9105e03f 100644
--- a/sdk/servicebus/service-bus/src/receivers/receiverCommon.ts
+++ b/sdk/servicebus/service-bus/src/receivers/receiverCommon.ts
@@ -108,7 +108,7 @@ export function abandonMessage(
   message: ServiceBusMessageImpl,
   context: ConnectionContext,
   entityPath: string,
-  propertiesToModify: { [key: string]: any } | undefined,
+  propertiesToModify: { [key: string]: number | boolean | string | Date | null } | undefined,
   retryOptions: RetryOptions | undefined
 ): Promise<void> {
   receiverLogger.verbose(
@@ -130,7 +130,7 @@ export function deferMessage(
   message: ServiceBusMessageImpl,
   context: ConnectionContext,
   entityPath: string,
-  propertiesToModify: { [key: string]: any } | undefined,
+  propertiesToModify: { [key: string]: number | boolean | string | Date | null } | undefined,
   retryOptions: RetryOptions | undefined
 ): Promise<void> {
   receiverLogger.verbose(
@@ -152,7 +152,9 @@ export function deadLetterMessage(
   message: ServiceBusMessageImpl,
   context: ConnectionContext,
   entityPath: string,
-  propertiesToModify: (DeadLetterOptions & { [key: string]: any }) | undefined,
+  propertiesToModify:
+    | (DeadLetterOptions & { [key: string]: number | boolean | string | Date | null })
+    | undefined,
   retryOptions: RetryOptions | undefined
 ): Promise<void> {
   receiverLogger.verbose(
diff --git a/sdk/servicebus/service-bus/src/receivers/sessionReceiver.ts b/sdk/servicebus/service-bus/src/receivers/sessionReceiver.ts
index ff63a7864b0a..5cadd9a2b65e 100644
--- a/sdk/servicebus/service-bus/src/receivers/sessionReceiver.ts
+++ b/sdk/servicebus/service-bus/src/receivers/sessionReceiver.ts
@@ -510,7 +510,7 @@ export class ServiceBusSessionReceiverImpl implements ServiceBusSessionReceiver
 
   async abandonMessage(
     message: ServiceBusReceivedMessage,
-    propertiesToModify?: { [key: string]: any }
+    propertiesToModify?: { [key: string]: number | boolean | string | Date | null }
   ): Promise<void> {
     this._throwIfReceiverOrConnectionClosed();
     throwErrorIfInvalidOperationOnMessage(message, this.receiveMode, this._context.connectionId);
@@ -526,7 +526,7 @@ export class ServiceBusSessionReceiverImpl implements ServiceBusSessionReceiver
 
   async deferMessage(
     message: ServiceBusReceivedMessage,
-    propertiesToModify?: { [key: string]: any }
+    propertiesToModify?: { [key: string]: number | boolean | string | Date | null }
   ): Promise<void> {
     this._throwIfReceiverOrConnectionClosed();
     throwErrorIfInvalidOperationOnMessage(message, this.receiveMode, this._context.connectionId);
@@ -542,7 +542,7 @@ export class ServiceBusSessionReceiverImpl implements ServiceBusSessionReceiver
 
   async deadLetterMessage(
     message: ServiceBusReceivedMessage,
-    options?: DeadLetterOptions & { [key: string]: any }
+    options?: DeadLetterOptions & { [key: string]: number | boolean | string | Date | null }
   ): Promise<void> {
     this._throwIfReceiverOrConnectionClosed();
     throwErrorIfInvalidOperationOnMessage(message, this.receiveMode, this._context.connectionId);