Hey there,
Can somebody please explain to me why I need to set Outlook-Anywhere on my legacy (2010) servers if I'm not using Outlook Anywhere externally in the org and don't intend to? Keep reading that it's a must so that 2013 can proxy requests, but not really sure why it would need to proxy requests if I didn't want to allow OA externally (and going through 2013 CAS).
I'll also add that the only namespace I've cutover is Autodiscover. I have around 2000 mailboxes migrated over from 2010 on to 2013 and I don't really see any problems (still a good thousand on 2010). Not sure if I was supposed to point rpcclientaccessarray records at my 2013 cas, or what advantage that would give. 2010 Exchange mailbox users can connect to 2013 mailboxes when given access (presumably due to Autodiscover). Everything just seems to work.
So please, if someone could tell me the error of my ways or reaffirm that everything's going according to plan I'd really appreciate it. Apologies if my questions are a little diffuse!
Joe