Troubleshoot errors in Calendar Interoperability

To check if you have set up Calendar Interoperability successfully, you can perform tests using tools in the Zoho Mail Admin Console. The Reports tab will display the results along with error messages. You can troubleshoot the errors incurred while setting up Interoperability using specific Troubleshooting tips.

No response received from Exchange server

This error occurs when the connection between Zoho Calendar and Microsoft Exchange server is not established successfully. It is possible for a firewall to block the connectivity between both servers. If you incorrectly entered the hostname or port, your connection will not be successful.  

Suggested fix

There is a chance that the Exchange server might not be connected to the internet. You can use the Microsoft Remote Connectivity Analyser tool to check if the Exchange server is accessible from the internet. 

SSL Handshake exception

SSL certificate is required while trying to set up internet connectivity in Calendar Interoperability. The SSL Handshake exception error occurs if:

• The certificate doesn’t match the name of the host that you are trying to connect to. 
• You have entered the IP address instead of the hostname. 
• The SSL certificate is invalid or it has expired.
• The SSL certificate has been issued by an untrusted root certificate authority.

Suggested fix

While entering the hostname, double-check if the name matches the one in the SSL certificate. Also, check if your SSL certificate license is still valid and then proceed.

Unable to resolve email address

This error occurs if the entered email address does not exist in the Exchange server.

Suggested fix

Make sure to specify the correct email address while configuring in Exchange.