Fix #3703 - issue with IsFavoriteByDefault parameter in creating teams channel

documentation/Add-PnPTeamsChannel.md

@@ -99,7 +99,8 @@ Accept wildcard characters: False
 ```
 
 ### -IsFavoriteByDefault
-Allows you to specify if the channel is by default visible for members
+Allows you to specify if the channel is by default visible for members.
+**This parameter is obsolete. [Microsoft Graph API docs](https://learn.microsoft.com/en-us/graph/api/resources/channel?view=graph-rest-1.0#properties) mention that it only works when you create a channel in Teams creation request. It will be removed in a future version.**
 
 ```yaml
 Type: Boolean
@@ -156,4 +157,4 @@ Accept wildcard characters: False
 
 ## RELATED LINKS
 
-[Microsoft 365 Patterns and Practices](https://aka.ms/m365pnp)
+[Microsoft 365 Patterns and Practices](https://aka.ms/m365pnp)

src/Commands/Teams/AddTeamsChannel.cs

@@ -40,6 +40,7 @@ public class AddTeamsChannel : PnPGraphCmdlet
         [Parameter(Mandatory = true, ParameterSetName = ParameterSET_PRIVATE)]
         public string OwnerUPN;
 
+        [Obsolete("It is not supported by Microsoft Graph API now. It will be removed in the next major release.")]
         [Parameter(Mandatory = false, ParameterSetName = ParameterSET_SPECIFIC)]
         [Parameter(Mandatory = false, ParameterSetName = ParameterSET_STANDARD)]
         public bool IsFavoriteByDefault;

src/Commands/Utilities/TeamsUtility.cs

@@ -667,7 +667,7 @@ public static async Task<TeamChannel> AddChannelAsync(string accessToken, PnPCon
             }
             else
             {
-                channel.IsFavoriteByDefault = isFavoriteByDefault;
+                channel.IsFavoriteByDefault = null;
                 return await GraphHelper.PostAsync<TeamChannel>(connection, $"v1.0/teams/{groupId}/channels", channel, accessToken);
             }
         }