When we try to attach a huge file (about 70MBs) in Dynamics Portal, which is less than the max file size limit(100MBs) in CRM, we get an Error.

ExceptionMessage: The request channel timed out while waiting for a reply after 00:01:58.5002351. Increase the timeout value passed to the call to Request or increase the SendTimeout value on the Binding. The time allotted to this operation may have been a portion of a longer timeout.

Any thoughts how can this be fixed?

Thank you.