The following fixed the problem for me:
Code:
su zimbra
zmcontrol stop
Once the services have stopped exit to root and:
Code:
/opt/zimbra/libexec/zmfixperms --extended
Then ...
Code:
su zimbra
zmcontrol start
Not sure what initally caused the problem and it was only present for a single account. However, this fixed the issue.
Hope that helps anyone else.
Cheers,
Rob