The plug-in execution failed because no Sandbox Hosts are currently available. Please check that you have a Sandbox server configured and that it is running.

Hi,

We had our plugins registered in Sandbox mode (for development we were using on premise and were deploying it on online environment) and the Microsoft Dynamics CRM Sandbox Processing Service was not running.

Starting the service resolved the issue.

Hope it helps.

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“System.ArgumentException: The specified string is not in the form required for a subject” error while sending mail through plugin in CRM 2011.

Hi,

We were getting the above error in one of our plugin which was using SendEmailRequest to send mail.

As it turned out it was because of the subject not being in proper format in the template

 

 

Hope it helps.