Exchange Server 2010 running on Windows SBS 2011. Fully patched.
There is a public folder in Exchange that is shared by all users. All users have been given full write access to the public folder.
Not a lot of users. About 4-5 active users.
One user has an issue where on the account you can see new emails come in. But when you read/flag/colour/delete emails. This change cannot be seen by other users. And changes made by other user cannot be seen by this one user.
Changes among the other users are all visible among themselves.
Just this one user is left out.
So often this user will see a bunch of unread emails in the public folder inbox when they have already been read and marked by other users.
I've checked that all users have the same share permissions on this public folder.
I do not believe this is an Outlook or workstation issue as the same issue can be observed in OWA/webmail.
Please suggest further troubleshooting methods.
Let me know if more info is required.