Exchange 2013 SP1. On going Saga- Last night we cut over to full co-existence with DNS changes for use of legacy namespace and had to roll back again. We had only two issues but one was considered a show stopper.
The main issue was that Active Sync would not work correctly for 2007 users. It failed the exchange connectivity test and would only work on a device if the domain was entered - or if the legacy namespace was entered manually. That would have meant chaos for several thousand users so we rolled back. (It worked perfectly for 2013 users).
The error given by the test was "foldersync failed" when I drilled down into the detail. It found autodiscover but failed after the initial handshake. (All other tests passed for 2007 and 2013 users)
We tried:
1. Populating both Autodisover internal and external urls with the legacy namespace
2. Populating only the internal url and leaving the external blank (both 1 and 2 had the same result)
3. Leaving both URLs blank to force 2013 to proxy to the 2007 cas (totally broke it- would not resolve at all)
I don't know if this is related but SSO is failing for 2007 OWA - two prompts.
Environment notes- all internal co-existence is working and the internal LTM F5's are working. Externally we use 2 GTM F5 to the LTM f5's to Ex2013. 2007 has SSL being passed through all the way to the CAS. Servers are split into CAS and MBX over 2 DC's. Everything else externally was working when we cut over.
any and all help appreciated
Tony