That's pretty typical behavior during a migration. I've run into that and an awful lot of others and they're all different. My first response would be apologize up and down for the inconvenience and get that migration done as soon as possible. Nothing causes friction like a migration, we've had a number of clients run into this same scenario and put the brakes on the migration temporarily, thinking the problem would follow into 2010. All have felt the pinch of that decision. Well, hind sight being 20/20 I can say without a doubt you will be much happier when you have finished. I think our smoothest migration to date was for 80,000+ users all done in one weekend. Sure there were a few issues but they were all taken care very quickly in comparison.
I guess that wasn't really how to fix it, sorry about that, more looking at the bigger picture. Get it done then track down the problems when you don't have a basket of snakes, venomous ones. M From: Thiessen, Matt [mailto:mthies...@gprc.ab.ca] Sent: Wednesday, June 01, 2011 3:17 PM To: MS-Exchange Admin Issues Subject: Send on Behalf error Hello, I have run into and interesting problem when using outlook 2010 with exchange 2003. The user has permission to send on behalf of their boss. When they go into the from field and look up their boss the email gets sent fine. When they select the same from email address using the dropdown where it remembers the name the message does not go through. They get a NDR with the following: Your message did not reach some or all of the intended recipients. Subject: test Sent: 5/24/2011 1:50 PM The following recipient(s) cannot be reached: Lastname, Firstname on 5/24/2011 1:50 PM You do not have permission to send to this recipient. For assistance, contact your system administrator. MSEXCH:MSExchangeIS:/DC=ca/DC=ab/DC=gprc:servername I will mention as well that they are running in cache exchange mode on the client, it is happening to more than just 1 person as well. We are running in a mixed mode environment with users being migrated over to 2010. Any ideas will be appreciated. Thank you, Matt Thiessen IT Systems Manager Grande Prairie Regional College 780-539-2852 --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist