Update Set-AvailabilityConfig.md

update to set-availablityconfig parameter for the new free/busy changes configs now available via tenant ids

Author: TariqSharif-MSFT

exchange/exchange-ps/exchange/Set-AvailabilityConfig.md

@@ -36,6 +36,8 @@ The Set-AvailabilityConfig cmdlet defines two accounts or security groups: a per
 
 For cross-forest availability services to retrieve free/busy information in the current forest, they must be using one of the specified accounts, belong to one of the specified security groups, or have a username and password for one of the specified accounts or security groups.
 
+For Exchange Online the cmdlets lets you update the set of tenant ids with whome sharing of free/busy information is allowed. 
+
 You need to be assigned permissions before you can run this cmdlet. Although this topic lists all parameters for the cmdlet, you may not have access to some parameters if they're not included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see [Find the permissions required to run any Exchange cmdlet](https://learn.microsoft.com/powershell/exchange/find-exchange-cmdlet-permissions).
 
 ## EXAMPLES
@@ -54,12 +56,18 @@ Set-AvailabilityConfig -OrgWideAccount <ExampleCredentials>
 
 This example is useful if the remote forest isn't trusted. Because this account is used for a cross-forest free/busy proxy account or group, minimize security vulnerabilities by using the credentials of a user who doesn't have an Exchange mailbox. When you're prompted, type the username and password.
 
+### Example 3
+```powershell
+Set-AvailabilityConfig -AllowedTenantIds "d6b0a40e-029b-43f2-9852-f3724f68ead9, 87d5bade-cefc-4067-a221-794aea71922d"
+```
+
+In this example for Exchange Online, the availability config is updated to allow sharing of free/busy with tenants that are represented by the ids listed.
+
+
 ## PARAMETERS
 
 ### -AllowedTenantIds
-This parameter is available only in the cloud-based service.
-
-{{ Fill AllowedTenantIds Description }}
+This parameter is used to set the list tenant ids with whome to share the free/busy information with. Maximum of 25 tenant ids is allowed. 
 
 ```yaml
 Type: MultiValuedProperty