How to resolve issues with Office 365 Calendar information.
Scope
If you're using ESP to provide Frontend Authentication for your Exchange environment, it's possible that your Office 365 clients are unable to see calendar information for your On Premise Exchange Users.
Solution
Add two "Autodiscover" directories to your "Pre-Authorization Excluded Directories"
(Only Necessary if you Do Not have "Delegate to Server" set as your "Client Authentiaction Mode").
Configuration
Navigate to your Exchange Virtual Service > Autodiscover Sub Virtual Service > ESP Options > "Pre-Authorization Excluded Directories. Add the below directories space separated.
/autodiscover/autodiscover.svc/wssecurity /autodiscover/autodiscover.svc
Comments
Thank you for bringing this to our attention. We have gone ahead and made the change.
marc.wilkinson
going through this now. is it just me or is the line to be added to Pre-Authorization Excluded Directories missing the "y" at the end of wssecurity?