Hi,
When I manage the send as permission on a mailbox in my Exchange 2010 environment the permission seems to remove itself within an hour. I realised after looking at some threads on TechNet that it was because the admincount attribute for the user account was set to 1 and therefore is a protected group. I then went about making sure that everything I needed to add send as permissions to had an admincount attribute value that was not set. I then reset the send as permissions and thought that would be the end of it.
I went to check that the permissions had stayed and noticed that they had been removed again. I went into active directory and looked at the two accounts associated with the mailboxes I had added in send as permissions for and these two accounts both now had an admincount attribute of 1 again. Every other standard user and group in AD has an admincount value not set!
So it seems that adding send as permission to a mailbox is changing the users admincount attribute to 1, making it think that it is protected and then removing the permissions!!! Why is this happening and how can I stop this happening???
Thanks in Advance.