Re-Validate password every day?

Question

Not too long after replacing an old Sbs2003/Exchange2003 server with a new Sbs2008/Exchange2007 server all of my blackberry users started getting the validate password message below.  Please note that with the current account settings all blackberries worked fine on the old server with Exchange 2003 and for at time seemed to on the new server with Exchange 2007. 
“Validate the password for [email protected] in the BlackBerry Internet Service! Email messages from [email protected] are not being delivered to your BlackBerry device. To resume receiving email messages from this email address, validate the password for [email protected] in the BlackBerry Internet Service:”
When they try to revalidate their password they get the “your password is invalid” error.  Now if I manually restart all internet services on my Sbs2008/Exchange2007 server they can then go back to BIS and revalidate their password and everything works fine for a few hours then this process starts all over again.  I have read on the forms that Exchange 2007 and 2010 have changed the way users authenticate through OWA.  Is this the reason? Is there a fix forthcoming from BB or do we dump the blackberries?
Any help or advice is appreciated but keep in mind I’m just an Engineer who was dump enough to fix a computer once so keep it simple.

Answer 1

welcome to the BT community forum where customers help customers and only BT employees are the forum mods
I moved your post to avoid the replies getting confused with other post originator
the hh3 normally works ok so better to have a look to see if you can improve that before trying a new router
in order for the forum members to help please can you post the adsl stats from your router you may need to 'show detail' to get all stats (if hub enter 192.168.1.254 in your browser and navigate to adsl or if HH4/5 then go to troubleshooting then logs and you are looking for 2 line together when hub last connected to internet and they will show your connection speed and noise margin or if netgear enter 192.168.0.1). Then run  btspeedtester  (MAC users may have problems). when first test completes then run diagnostic test and post the results ( do not reset the router).
are you connected directly via a filter to the NTE5 master or test socket or to somewhere else? Is the master the only phone socket in your home?
Have you tried the quiet line test? - dial 17070 option 2 - should hear nothing - best done with a corded phone. if cordless phone you may hear a 'dull hum' which is normal
Someone may then be able to offer help/assistance/suggestions to your problem
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