Select the product you need help with
- Internet Explorer
- Windows Phone
- More products
Error message when you try to overlay an Exchange calendar in a SharePoint page on a server that is running SharePoint Server 2010 or SharePoint Foundation 2010: "Could not establish trust relationship for the SSL/TLS secure channel with authority"
Article ID: 982982 - View products that this article applies to.
Consider the following scenario:
In this scenario, free/busy information is not displayed from the Exchange calendar. Additionally, you receive the following error message:
Could not establish trust relationship for the SSL/TLS secure channel with authority 'Exchange_mail_server'. (87ed56e6-5b15-41ad-8672-72afdeb45460)
This issue occurs because SharePoint Server 2010 and SharePoint Foundation 2010 have their own certificate store that misses the certificate chain for the Exchange server.
To work around this issue, use one of the following methods: