Locate the W3SVC(ID) folder, where ID is the number of the website ID above in step 2.Next navigate to the IIS log files path: C:\inetpub\logs\LogFiles.Determine the ID for the “MailEnable Protocols” website.
Navigate within IIS to the “Sites” node.IIS 7.5 sets a default value of 49152 Bytes for the “UploadReadAheadSize” value which limits the amount of bytes allowed in the entity body of a request and the number of bytes a Web server will read into a buffer and pass to an ISAPI extension. Ther are number of reasons, couple of them listed below.įirst one I have found is ActiveSync limit set to 10MB (%ExchangeInstallPath%ClientAccess\Sync\web.config maxRequestLength=”10240″)Ī global IIS restriction preventing uploads larger than 49152 Bytes. Not all mobile devices behave this way and may just keep the message in the outbox folder and retried until removed from the folder. Some devices may return an error indicating that “The message that was sent to the server was rejected because the message was too large”. When sending from a Mobile device via the ActiveSync service the device fails to send. Memorise Cannot send large messages via ActiveSync, iPhone/iPad April 16, 2020
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