Merge pull request #229029 from kperla97/patch-6

Update service-limits.md

Author: prmerger-automator[bot]

articles/communication-services/concepts/service-limits.md

@@ -7,7 +7,7 @@ manager: shahen
 services: azure-communication-services
 
 ms.author: chpalm
-ms.date: 11/01/2021
+ms.date: 02/28/2023
 ms.topic: how-to
 ms.service: azure-communication-services
 ms.subservice: data
@@ -17,7 +17,7 @@ ms.subservice: data
 This document explains the limitations of Azure Communication Services APIs and possible resolutions.
 
 ## Throttling patterns and architecture
-When you hit service limitations, you'll generally receive an HTTP status code 429 (Too many requests). In general, the following are best practices for handling throttling:
+When you hit service limitations, you will receive an HTTP status code 429 (Too many requests). In general, the following are best practices for handling throttling:
 
 - Reduce the number of operations per request.
 - Reduce the frequency of calls.
@@ -124,6 +124,9 @@ This sandbox setup is to help developers start building the application. You can
 |Send typing indicator|User and chat thread|5|15|
 |Send typing indicator|Chat thread|10|30|
 
+### Chat storage
+Chat messages are stored for 90 days. Submit [a request to Azure Support](../../azure-portal/supportability/how-to-create-azure-support-request.md) if you require storage for longer time period. If the time period is less than 90 days for chat messages, use the delete chat thread APIs.
+
 ## Voice and video calling
 
 ### Call maximum limitations
@@ -140,7 +143,7 @@ The Communication Services Calling SDK supports the following streaming configur
 | **Maximum # of outgoing local streams that you can send simultaneously**     | one video or one screen sharing | one video + one screen sharing |
 | **Maximum # of incoming remote streams that you can render simultaneously** | four videos + one screen sharing | six videos + one screen sharing |
 
-While the Calling SDK won't enforce these limits, your users may experience performance degradation if they're exceeded.
+While the Calling SDK will not enforce these limits, your users may experience performance degradation if they're exceeded.
 
 ### Calling SDK timeouts