Originally Posted by blackberry1
The default messaging service still remains Webclient[CMIME],hence emails are received and can be replied ,it fails when you try to compose and send a new message .
Actually, Desktop [CMIME] will always overwrite the Web Client [CMIME] as the default messaging service since it is the more secure of the two, and holds a higher priority.
Quite often if the user is getting a "no messaging services are configured, you will only be able to save a draft" message, delete the Desktop [CMIME] service book, then undeleting it will cause it to re-register itself properly with the messaging services.
Check the user's incoming email. If it says "Sent using: unknown (secure)" then it's the service book has become 'unregisterred' with the messaging services and delete/undelete should resolve it. If not, you can try delete the service book and resend them from the BES. If not, you can try to delete it and use the desktop manager to generate a new encryption key (if you have DTM installed). If not, then it's probably easiest to remove the user from the BES, add them back, and redo the EA.