Recently, I am trying to upgrade my site to Exchange 2013 from 2010.  Most of the functions are work without problem except 2013 mailbox user try to access the sharing calendar on Exchange 2010 mailbox server.

e.g. User A is exchange 2010 mailbox user

user create a calendar 'testing' and sharing with user B

who is exchange 2013 mailbox user when user B try to add the calendar in OWA, user B get

'The action couldn't be completed.

An error occurred and your request couldn't be completed.  If the problem continuesm contact your helpdesk with this HTTP Status code: 500.'

Actually, the error is 'The Client Access server version doesn't match the Mailbox server version of the resource that was being accessed. To determine the correct URL to use to access the resource, use Autodiscover with the address of the resource.'

But there are no problem if user A sharing his own calendar.  User B could add it without problem.

user B can access the calendar from outlook ? if its still not working from outlook please try to repair outlook profile and check

Regards

John

• Edited by Johnpaul J 2 hours 40 minutes ago

user B can access the calendar from outlook ? if its still not working from outlook please try to repair outlook profile and check

Regards

John

Thanks for your reply.  However, user B could not add the calendar in OWA 2013.  I think, it doesn't related to outlook profile.