Exchange 2010 Calendar Sharing Error

[sven]

Hello,

When any users try to share calendars out, they get the following error message in a dialogue box:

"error while preparing to send sharing message"

I don't get any more information than that. Some stuff I've read has pointed to an issue with the autodiscovery running within IIS7.0. Has anyone else seen this issue before?

Thanks!

Sven.

Edit: It might be worth noting that this error only happens when using Outlook 2010. when users have used OWA then this doesn't seem to be an issue.

[sukh]

only on user with the issue or more?

Create a new Outlook profile and tets

Create a new windows profile and test

[sven]

only on user with the issue or more?

Create a new Outlook profile and tets

Create a new windows profile and test

All users all the time, creating new profiles makes no difference, Windows profiles make no difference.

Thanks for the suggestions though

[sukh]

1. Test your autodiscover from Outlook. Seems to be an issue with Autodiscover.
2. Test and Verify Autodiscover &
3. Check and set your internal URI for all three - Security warning when you start Outlook 2007 and then connect to a mailbox that is hosted on a server that is running Exchange Server 2007 or Exchange Server 2010: "The name of the security certificate is invalid or does not match the name of the sit