Error 5126.96.36.199 Client does not have permissions to send as this sender
Posted on 2007-12-06
Hi Guys and Girls,
I have 250 users all on my exchange 2007 box. All users can send via OWA with no problem what-so-ever. I have one user that needs to use POP or iMAP (in OE) and recieves the following error message when sending (recieveing is fine): Error 5188.8.131.52 Client does not have permissions to send as this sender. I assumed it was just a POP/iMAP issue but it turns out she cannot send via OWA either (clicking new/reply/forward produces nothing - not even an error).
I have tried around 10 other users from the same and/or differnet AD OU's and OWA/POP/iMAP all worl hunky dorey - it is purely this one user! I am not yet terribly up to speed on the new 'console for everything' approach so don't even know where to start, all obvious GUI configurations for that mailbox seem fine.
Any help urgently and greatfully recieved!