Please please help. I've been all over the place and have yet to find a solution. Quick overview of our environment:
2007/2010 coexistence
One domain, 2 sites
3 CAS Servers in Site1 internet facing
3 CAS Servers in Site2 non-internet facing
When any 2010 users attempts to see the free/busy information of another 2010 user in a different site, we see nothing but diagonal slashes. When we mouse over the area, we see two messages; "No free/busy information could be retreived." and "The recipients server could not be contacted."
This worked at one point and suddenly stopped working. The only thing that I can think may be causing an issue is this - recently I created two public folder databases in 2010 from which 2007 public folder data could be replicated. These 2010
public folder databases are not configured to receive free/busy info from 2007, all web based.
I've ensured that Site2 does not have EWS external URLs (all internal URLs match), I've checked token permissions, I've run every damned test I can think of in EMS and all looks normal. I just don't know what else to do. Please help.