Merge pull request #198101 from dlepow/patch-106

[APIM] Update api-management-advanced-policies.md

Author: PRMerger18

articles/api-management/api-management-advanced-policies.md

@@ -249,7 +249,7 @@ This operation level policy does not forward requests to the backend service.
 
 | Attribute                                     | Description                                                                                                                                                                                                                                                                                                    | Required | Default |
 | --------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------- | ------- |
-| timeout="integer"                             | The amount of time in seconds to wait for the HTTP response headers to be returned by the backend service before a timeout error is raised. Minimum value is 0 seconds. Values greater than 240 seconds may not be honored as the underlying network infrastructure can drop idle connections after this time. | No       | None    |
+| timeout="integer"                             | The amount of time in seconds to wait for the HTTP response headers to be returned by the backend service before a timeout error is raised. Minimum value is 0 seconds. Values greater than 240 seconds may not be honored as the underlying network infrastructure can drop idle connections after this time. | No       | 300    |
 | follow-redirects="false | true"          | Specifies whether redirects from the backend service are followed by the gateway or returned to the caller.                                                                                                                                                                                                    | No       | false   |
 | buffer-request-body="false | true"       | When set to "true", request is buffered and will be reused on [retry](api-management-advanced-policies.md#Retry).                                                                                                                                                                                               | No       | false   |
 | buffer-response="false &#124; true" | Affects processing of chunked responses. When set to "false", each chunk received from the backend is immediately returned to the caller. When set to "true", chunks are buffered (8 KB, unless end of stream is detected) and only then returned to the caller.<br/><br/>Set to "false" with backends such as those implementing [server-sent events (SSE)](how-to-server-sent-events.md) that require content to be returned or streamed immediately to the caller. | No | true |