Make certain the LoginTypes match between Ex2k7 and Ex2k10 IMAP settings.
On Fri, Sep 30, 2011 at 2:42 PM, Steven Alfano <[email protected] > wrote: > We are having issues with IMAP clients (various clients on various OS’s) > connecting to Exchange 2007 CAS and mailbox servers when we change our TMG > rule to redirect clients to our 2010 CAS in preparation for an eventual > migration to Exchange 2010. Currently there is a single external entry > point for all IMAP clients over port 993 pointing to our TMG server. Our > Exchange system consists of TMG servers in an Array (two servers with a DB > server) There are two Exchange 2007 CAS running an NLB and a single 2007 CCR > mailbox server. Exchange 2010 has two CAS running an NLB with a 2 node DAG. > When we switch the TMG rule to point to the Exchange 2010 CAS NLB we get a > variety of intermittent client RECEIVE (fetch) connectivity issues ranging > from poor performance and IMAP synchronization to on some clients, inability > to connect. Please note all mailboxes are on Exchange 2007 we are just > changing the TMG rule for IMAP clients to point to the 2010 NLB. Testing > was also done redirecting to a single 2010 CAS with similar results. **** > > ** ** > > **· **Thunderbird reported this Alert **** > > “*An error occurred during a connection to <OurDomainName>:993. SSL > received a record that exceeded the maximum permissible length. (Error code: > ssl_error_rx_record_too_long)*” **** > > **· **Reinstalling or upgrading the IMAP client seemed to have > helped in some instances with this and some other performance / connectivity > issues. **** > > **· **Outlook, configured as* *IMAP; reported synchronization > issues.**** > > **· **In other tests, we've had IMAP clients reject the mailbox > password and continuously prompt for a password without locking the users AD > account due to bad passwords.**** > > ** ** > > I opened a case with MS support and they analyzed the IMAP logging files, > along with everything else on TMG, DC’s and Exchange servers without finding > any issues with these servers. The IMAP clients are configured correctly as > they can connect once the rule is reverted back to point to the 2007 NLB. > **** > > ** ** > > One would assume that changing a TMG rule to point from an existing > functioning exchange 2007 server to an Exchange 2010 server would not > generate widespread intermittent client connectivity issues, but it seems to > in our exchange configuration. Please note that we are NOT moving the > mailboxes just a TMG rule.**** > > ** ** > > Has anyone come across or experienced this? Any known solution? Any and > all information is greatly appreciated**** > > ** ** > > *Steven Alfano* > > *Sr. Systems Administrator* > > *The Rockefeller University* > > 1230 York Avenue**** > > New York, NY 10065-6399**** > > Voice 212.327.8937**** > > Mobile 646.438.5160**** > > fax 212.327.8712**** > > [email protected]**** > > www.rockefeller.edu**** > > ** ** > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to [email protected] > with the body: unsubscribe exchangelist > --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe exchangelist
