Hello, one of our clients has a an Outlook client issue after migration from Exchange 2007 to 2013.
Bascially, mail is stuck in outbox of the main mailbox when sending mail using the main mailbox when there is an additonnal mailbox open. This issue is seen only, as far as we know, on Outlook 2010 clients under Windows XP.
It seems that i am not the only one in this situation, see: http://www.reddit.com/r/sysadmin/comments/1dwhfm/exchange_2013_cached_mode_additional_mailbox/
We are currently tring to use the solution provided in the end of the reddit article :
A- by re-applying permissions with "add-mailboxpermission" and playing with the automapping attribute.
B - It seems too that removing the additionnal mailbox from the profile and adding it back, solves the issue.
But at this point, we cannot say that either A or B or a combination of both actions A and B solved the problem.
When we have more information, we will comment.
However, if any of the MS Engineers had an idea for troubleshoooting steps, we are interested, and we thought that reporting the issue may be important for the community.
And FYI, certificates are OK, outlook anywhere is OK, autodiscover OK, OAB download is OK, all URI are OK, no Outlook authentication popups, no stale connections (CTRL+SHIFT + right click outlook -> connection state are all OK)
The Exchange 2007 is not yet decommissionned. only powered off.
Any idea welcome !