We have a business team that constantly monitor certain public folders for updates and file them as soon as they are recieved. however, the users in that team are reporting that the contents of the public folder only update every 15 minutes. I have confirmed this and also checked other folders and they are also showing the same thing. If i send a test email to a public folder it should display it immediately, however i have to wait until either 02, 17, 32 or 47 minutes past the hour until it is displayed. The emails are reaching the folder immediately, but the folder when viewed in outlook does not update until those times.
Any ideas what are causing this. I have changed public folder replication down to 10 minutes but this has had no effect.
We are using Exchange 2010 SP 1 UR6 and Outlook 2010 clients.